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My Time machine Back up has stopped working with the error message "Unable to complete backup. An error occurred while creating the backup folder."

My Time machine Back up has stopped working with the error message "Unable to complete backup. An error occurred while creating the backup folder." Does anybody know how to resolve this issue. I've seen a similar message posted about copying to the back up folder, rather than creating.

MacBook Pro (13-inch Late 2011), OS X Yosemite (10.10.5)

Posted on Sep 16, 2015 10:56 AM

Reply
18 replies

Sep 16, 2015 1:29 PM in response to johnemoff

These instructions must be carried out as an administrator. If you have only one user account, you are the administrator.

Launch the Console application in any of the following ways:

☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)

☞ In the Finder, select Go Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.

☞ Open LaunchPad and start typing the name.

The title of the Console window should be All Messages. If it isn't, select

SYSTEM LOG QUERIES All Messages

from the log list on the left. If you don't see that list, select

View Show Log List

from the menu bar at the top of the screen.

In the top right corner of the Console window, there's a search box labeled Filter. Enter the word "Starting" (without the quotes.) You should now see log messages with the words "Starting * backup," where * represents any of the words "automatic," "manual," or "standard."

Each message in the log begins with the date and time when it was entered. Note the timestamp of the last "Starting" message that corresponds to the beginning of an abnormal backup. Now

CLEAR THE WORD "Starting" FROM THE TEXT FIELD

so that all messages are showing, and scroll back in the log to the time you noted. Select the messages timestamped from then until the end of the backup, or the end of the log if that's not clear. Copy them to the Clipboard by pressing the key combination command-C. Paste into a reply to this message by pressing command-V.

If all you see are messages that contain the word "Starting," you didn't clear the text field.

The log contains a vast amount of information, almost all of which is irrelevant to solving any particular problem. When posting a log extract, be selective. Don't post more than is requested.

Please don't indiscriminately dump thousands of lines from the log into this discussion.

Please don't post screenshots of log messages—post the text.

Some private information, such as your name, may appear in the log. Anonymize before posting.

When you post the log extract, you might see an error message on the web page: "You have included content in your post that is not permitted," or "The message contains invalid characters." That's a bug in the forum software. Please post the text on Pastebin, then post a link here to the page you created.

Sep 17, 2015 12:33 AM in response to Linc Davis

Hi Linc


Thanks for your help, please see code below. I hope I haven't copied too many lines:


16/09/2015 18:34:08.116 com.apple.backupd-helper[2559]: Attempt to use XPC with a MachService that has HideUntilCheckIn set. This will result in unpredictable behavior: com.apple.backupd.status.xpc

16/09/2015 18:34:41.495 com.apple.backupd[2778]: Starting automatic backup

16/09/2015 18:35:12.851 imagent[290]: <IMMacNotificationCenterManager: 0x7fdf83d2eb90>: notification observer: com.apple.FaceTime notification: __CFNotification 0x7fdf83f3bc90 {name = _NSDoNotDisturbEnabledNotification}

16/09/2015 18:35:12.851 identityservicesd[280]: <IMMacNotificationCenterManager: 0x7fa3d9d170e0>: notification observer: com.apple.iChat notification: __CFNotification 0x7fa3d9e7c5d0 {name = _NSDoNotDisturbEnabledNotification}

16/09/2015 18:35:13.241 WindowServer[154]: device_generate_desktop_screenshot: authw 0x7f9966894290(2000), shield 0x7f9961f69e80(2001)

16/09/2015 18:35:13.252 WindowServer[154]: device_generate_lock_screen_screenshot: authw 0x7f9966894290(2000)[0, 0, 1280, 800] shield 0x7f9961f69e80(2001), dev [1280,800]

16/09/2015 18:35:13.722 launchservicesd[77]: Application App:"Safari" asn:0x0-10a10a pid:2175 refs=8 @ 0x7f917865a530 tried to be brought forward, but isn't in fPermittedFrontApps ( ( "LSApplication:0x0-0x1001 pid=92 "loginwindow"")), so denying. : LASSession.cp #1521 SetFrontApplication() q=LSSession 100006/0x186a6 queue

16/09/2015 18:35:13.723 WindowServer[154]: [cps/setfront] Failed setting the front application to Safari, psn 0x0-0x10a10a, securitySessionID=0x186a6, err=-13066

16/09/2015 18:35:13.739 CoreServicesUIAgent[2733]: unexpected message <OS_xpc_error: <error: 0x7fff7549ac60> { count = 1, contents =

"XPCErrorDescription" => <string: 0x7fff7549af70> { length = 18, contents = "Connection invalid" }

}>

16/09/2015 18:35:15.196 imagent[290]: <IMMacNotificationCenterManager: 0x7fdf83d2eb90>: NC Disabled: NO

16/09/2015 18:35:15.196 identityservicesd[280]: <IMMacNotificationCenterManager: 0x7fa3d9d170e0>: NC Disabled: NO

16/09/2015 18:35:15.506 identityservicesd[280]: <IMMacNotificationCenterManager: 0x7fa3d9d170e0>: DND Enabled: YES

16/09/2015 18:35:15.506 imagent[290]: <IMMacNotificationCenterManager: 0x7fdf83d2eb90>: DND Enabled: YES

16/09/2015 18:35:15.507 imagent[290]: <IMMacNotificationCenterManager: 0x7fdf83d2eb90>: Updating enabled: NO (Topics: (

))

16/09/2015 18:35:15.507 identityservicesd[280]: <IMMacNotificationCenterManager: 0x7fa3d9d170e0>: Updating enabled: NO (Topics: (

))

16/09/2015 18:35:15.507 identityservicesd[280]: <IMMacNotificationCenterManager: 0x7fa3d9d24150>: notification observer: com.apple.iChat notification: __CFNotification 0x7fa3d9e7c5d0 {name = _NSDoNotDisturbEnabledNotification}

16/09/2015 18:35:15.512 identityservicesd[280]: <IMMacNotificationCenterManager: 0x7fa3d9d24150>: NC Disabled: NO

16/09/2015 18:35:15.517 identityservicesd[280]: <IMMacNotificationCenterManager: 0x7fa3d9d24150>: DND Enabled: YES

16/09/2015 18:35:15.518 identityservicesd[280]: <IMMacNotificationCenterManager: 0x7fa3d9d24150>: Updating enabled: NO (Topics: (

))

16/09/2015 18:35:19.091 loginwindow[92]: CoreAnimation: warning, deleted thread with uncommitted CATransaction; set CA_DEBUG_TRANSACTIONS=1 in environment to log backtraces.

16/09/2015 18:35:23.000 kernel[0]: nspace-handler-set-snapshot-time: 1442424925

16/09/2015 18:35:23.963 com.apple.mtmd[45]: Set snapshot time: 2015-09-16 18:35:25 +0100 (current time: 2015-09-16 18:35:23 +0100)

16/09/2015 18:35:28.792 com.apple.backupd[2778]: Attempting to mount network destination URL: afp://John%20Moffat;AUTH=SRP@John's%20AirPort%20Time%20Capsule._afpovertcp._tcp .local/Data

16/09/2015 18:35:30.937 NetAuthSysAgent[2779]: TUAMHandler::SetUAMType setting UAMType to 13

16/09/2015 18:35:37.399 cloudphotosd[2766]: Unable to get asset collection 83507CB0-26D8-436C-A311-624E8F640A84 from shared streams model

16/09/2015 18:35:37.552 cloudphotosd[2766]: Import downloaded assets: stream 7C1DF852-95F7-4190-A9C5-97DB6F2E31A5 unable to create import request for item 83507CB0-26D8-436C-A311-624E8F640A84: Error Domain=ICPPhotoErrorDomain Code=9 "The operation couldn’t be completed. (ICPPhotoErrorDomain error 9.)"

16/09/2015 18:35:39.572 mds[56]: (DiskStore.Normal:2382) d001 1.000007

16/09/2015 18:35:42.855 com.apple.backupd[2778]: Mounted network destination at mount point: /Volumes/Data using URL: afp://XX%20XXXXXXAUTH=SRP@XXXX's%20AirPort%20Time%20Capsule._afpovertcp._tcp.lo cal/Data

16/09/2015 18:35:42.879 mds[56]: (Volume.Normal:2464) volume:0x7fb654880800 ********** Bootstrapped Creating a default store:0 SpotLoc:(null) SpotVerLoc:(null) occlude:0 /Volumes/Data

16/09/2015 18:36:34.904 SonyAutoLauncher[310]: Enum Begin!

16/09/2015 18:36:46.292 diskarbitrationd[62]: loginwindow [92]:34671 not responding.

16/09/2015 18:36:47.998 SonyAutoLauncher[310]: Device path: (null)

16/09/2015 18:36:48.000 SonyAutoLauncher[310]: Device path: (null)

16/09/2015 18:36:48.001 SonyAutoLauncher[310]: Device path: (null)

16/09/2015 18:36:48.001 SonyAutoLauncher[310]: Enum End!

16/09/2015 18:36:48.974 SonyAutoLauncher[310]: Enum Begin!

16/09/2015 18:36:48.974 SonyAutoLauncher[310]: Enum End!

16/09/2015 18:36:48.975 SonyAutoLauncher[310]: Enum Begin!

16/09/2015 18:36:50.000 kernel[0]: hfs: mounted Time Machine Backups on device disk3s2

16/09/2015 18:36:51.560 com.apple.backupd[2778]: Disk image /Volumes/Data/John’s MacBook Pro.sparsebundle mounted at: /Volumes/Time Machine Backups

16/09/2015 18:36:54.264 mds[56]: (Volume.Error:880) Root store set to FSOnly with matching create! (loaded:1)

16/09/2015 18:36:55.514 com.apple.backupd[2778]: Backing up to /dev/disk3s2: /Volumes/Time Machine Backups/Backups.backupdb

16/09/2015 18:37:09.817 SonyAutoLauncher[310]: Device path: (null)

16/09/2015 18:37:09.820 SonyAutoLauncher[310]: Device path: /Volumes/Time Machine Backups

16/09/2015 18:37:09.821 SonyAutoLauncher[310]: Enum End!

16/09/2015 18:37:31.245 com.apple.backupd[2778]: Failed to create progress log file at path:/Volumes/Time Machine Backups/Backups.backupdb/John’s MacBook Pro/2015-09-16-173737.inProgress/.Backup.464117851.245210.log.

16/09/2015 18:37:31.248 com.apple.backupd[2778]: Event store UUIDs don't match for volume: Macintosh HD

16/09/2015 18:37:33.901 com.apple.backupd[2778]: Error: (Error Domain=NSCocoaErrorDomain Code=4 "The file “3C05C373-9B03-4D10-9DC7-4BF9C776F99B” doesn’t exist." UserInfo=0x7f881322bdc0 {NSFilePath=/Volumes/Time Machine Backups/Backups.backupdb/John’s MacBook Pro/2015-09-16-173737.inProgress/3C05C373-9B03-4D10-9DC7-4BF9C776F99B, NSUnderlyingError=0x7f881322c6f0 "The operation couldn’t be completed. No such file or directory"}) Creating directory 3C05C373-9B03-4D10-9DC7-4BF9C776F99B

16/09/2015 18:37:33.901 com.apple.backupd[2778]: Failed to make snapshot.

16/09/2015 18:37:34.933 com.apple.backupd[2778]: Backup failed with error 2: 2

16/09/2015 18:37:34.963 mdworker[2640]: (ImportBailout.Error:1325) Asked to exit for Diskarb

16/09/2015 18:37:34.963 mdworker[2638]: (ImportBailout.Error:1325) Asked to exit for Diskarb

16/09/2015 18:37:34.965 mdworker[2639]: (ImportBailout.Error:1325) Asked to exit for Diskarb

16/09/2015 18:37:34.968 mdworker[2637]: (ImportBailout.Error:1325) Asked to exit for Diskarb

16/09/2015 18:37:45.956 diskarbitrationd[62]: mds [56]:18999 not responding.

16/09/2015 18:37:53.000 kernel[0]: hfs: unmount initiated on Time Machine Backups on device disk3s2

16/09/2015 18:37:55.199 com.apple.backupd[2778]: Ejected Time Machine disk image: /Volumes/Data/John’s MacBook Pro.sparsebundle

16/09/2015 18:37:55.000 kernel[0]: AFP_VFS afpfs_unmount: /Volumes/Data, flags 0, pid 2830

16/09/2015 18:37:55.000 kernel[0]: ASP_TCP Disconnect: triggering reconnect by bumping reconnTrigger from curr value 0 on so 0xffffff80397637b0

16/09/2015 18:37:55.922 com.apple.backupd[2778]: Ejected Time Machine network volume.

16/09/2015 18:39:57.314 SystemUIServer[233]: Attempt to use XPC with a MachService that has HideUntilCheckIn set. This will result in unpredictable behavior: com.apple.backupd.status.xpc

16/09/2015 18:39:57.316 com.apple.prefs.backup.remoteservice[2753]: Attempt to use XPC with a MachService that has HideUntilCheckIn set. This will result in unpredictable behavior: com.apple.backupd.status.xpc

16/09/2015 18:40:13.384 com.apple.xpc.launchd[1]: (com.apple.imfoundation.IMRemoteURLConnectionAgent) The _DirtyJetsamMemoryLimit key is not available on this platform.

16/09/2015 18:40:14.886 com.apple.xpc.launchd[1]: (com.apple.imfoundation.IMRemoteURLConnectionAgent) The _DirtyJetsamMemoryLimit key is not available on this platform.

16/09/2015 18:40:19.000 kernel[0]: ZBAVKauth: pending entry not found for [0xffffff8047cfec30]

16/09/2015 18:40:19.000 kernel[0]: ZBAVKauth: [0xffffff8047cfec30] entry is missing

16/09/2015 18:40:23.395 com.apple.xpc.launchd[1]: (com.apple.imfoundation.IMRemoteURLConnectionAgent) The _DirtyJetsamMemoryLimit key is not available on this platform.

16/09/2015 18:40:23.395 com.apple.xpc.launchd[1]: (com.apple.imfoundation.IMRemoteURLConnectionAgent) The _DirtyJetsamMemoryLimit key is not available on this platform.

16/09/2015 18:40:23.442 com.apple.xpc.launchd[1]: (com.apple.imfoundation.IMRemoteURLConnectionAgent) The _DirtyJetsamMemoryLimit key is not available on this platform.

16/09/2015 18:40:23.492 com.apple.xpc.launchd[1]: (com.apple.imfoundation.IMRemoteURLConnectionAgent) The _DirtyJetsamMemoryLimit key is not available on this platform.

16/09/2015 18:41:13.051 com.apple.xpc.launchd[1]: (com.apple.quicklook[2845]) Endpoint has been activated through legacy launch(3) APIs. Please switch to XPC or bootstrap_check_in(): com.apple.quicklook

16/09/2015 18:41:13.108 periodic-wrapper[2844]: Running daily periodic task.

16/09/2015 18:43:58.113 identityservicesd[280]: [Warning] ====== IDS Traffic Usage:

16/09/2015 18:43:58.113 identityservicesd[280]: [Warning] Service: com.apple.madrid

16/09/2015 18:43:58.114 identityservicesd[280]: [Warning] queries: 3

16/09/2015 18:43:58.114 identityservicesd[280]: [Warning] incoming-messages: 46

16/09/2015 18:43:58.114 identityservicesd[280]: [Warning]

16/09/2015 18:43:58.114 identityservicesd[280]: [Warning] ====== Done

16/09/2015 18:46:22.852 WindowServer[154]: CGXDisplayDidWakeNotification [62601252395281]: posting kCGSDisplayDidWake

16/09/2015 18:46:22.853 WindowServer[154]: handle_will_sleep_auth_and_shield_windows: Deferring.

16/09/2015 18:46:22.978 imagent[290]: <IMMacNotificationCenterManager: 0x7fdf83d2eb90>: notification observer: com.apple.FaceTime notification: __CFNotification 0x7fdf83c7f390 {name = _NSDoNotDisturbDisabledNotification}

16/09/2015 18:46:22.978 identityservicesd[280]: <IMMacNotificationCenterManager: 0x7fa3d9d170e0>: notification observer: com.apple.iChat notification: __CFNotification 0x7fa3d9f6c110 {name = _NSDoNotDisturbDisabledNotification}

16/09/2015 18:46:23.009 identityservicesd[280]: <IMMacNotificationCenterManager: 0x7fa3d9d170e0>: NC Disabled: NO

16/09/2015 18:46:23.009 imagent[290]: <IMMacNotificationCenterManager: 0x7fdf83d2eb90>: NC Disabled: NO

16/09/2015 18:46:23.032 imagent[290]: <IMMacNotificationCenterManager: 0x7fdf83d2eb90>: DND Enabled: NO

16/09/2015 18:46:23.032 identityservicesd[280]: <IMMacNotificationCenterManager: 0x7fa3d9d170e0>: DND Enabled: NO

16/09/2015 18:46:23.032 imagent[290]: <IMMacNotificationCenterManager: 0x7fdf83d2eb90>: Updating enabled: YES (Topics: (

"com.apple.ess",

"com.apple.private.ac"

))

16/09/2015 18:46:23.032 identityservicesd[280]: <IMMacNotificationCenterManager: 0x7fa3d9d170e0>: Updating enabled: YES (Topics: (

"com.apple.private.alloy.icloudpairing",

"com.apple.private.alloy.continuity.encryption",

"com.apple.private.alloy.continuity.activity",

"com.apple.private.alloy.idstransfers",

"com.apple.private.ids",

"com.apple.private.alloy.phonecontinuity",

"com.apple.ess",

"com.apple.madrid",

"com.apple.private.alloy.continuity.auth",

"com.apple.private.ac",

"com.apple.private.alloy.idsremoteurlconnection",

"com.apple.private.alloy.sms",

"com.apple.private.alloy.screensharing",

"com.apple.private.alloy.maps",

"com.apple.private.alloy.callhistorysync",

"com.apple.private.alloy.continuity.tethering"

))

16/09/2015 18:46:23.033 identityservicesd[280]: <IMMacNotificationCenterManager: 0x7fa3d9d24150>: notification observer: com.apple.iChat notification: __CFNotification 0x7fa3d9eba480 {name = _NSDoNotDisturbDisabledNotification}

16/09/2015 18:46:23.038 identityservicesd[280]: <IMMacNotificationCenterManager: 0x7fa3d9d24150>: NC Disabled: NO

16/09/2015 18:46:23.043 identityservicesd[280]: <IMMacNotificationCenterManager: 0x7fa3d9d24150>: DND Enabled: NO

16/09/2015 18:46:23.044 identityservicesd[280]: <IMMacNotificationCenterManager: 0x7fa3d9d24150>: Updating enabled: YES (Topics: (

"com.apple.madrid"

))

16/09/2015 18:47:50.380 com.apple.xpc.launchd[1]: (com.apple.imfoundation.IMRemoteURLConnectionAgent) The _DirtyJetsamMemoryLimit key is not available on this platform.

16/09/2015 18:49:15.960 com.apple.xpc.launchd[1]: (com.apple.imfoundation.IMRemoteURLConnectionAgent) The _DirtyJetsamMemoryLimit key is not available on this platform.

16/09/2015 18:49:16.667 CloudKeychainProxy[2921]: __45-[UbiqitousKVSProxy doEnsurePeerRegistration]_block_invoke <UB---e-C---> ensurePeerRegistration called, success ((null))

16/09/2015 18:50:18.432 Office365Service[2924]: WARNING: The Gestalt selector gestaltSystemVersion is returning 10.9.5 instead of 10.10.5. Use NSProcessInfo's operatingSystemVersion property to get correct system version number.

Call location:

16/09/2015 18:50:18.432 Office365Service[2924]: 0 CarbonCore 0x97e5a291 ___Gestalt_SystemVersion_block_invoke + 135

16/09/2015 18:50:18.432 Office365Service[2924]: 1 libdispatch.dylib 0x956b0130 _dispatch_client_callout + 50

16/09/2015 18:50:18.432 Office365Service[2924]: 2 libdispatch.dylib 0x956b00b5 dispatch_once_f + 251

16/09/2015 18:50:18.432 Office365Service[2924]: 3 libdispatch.dylib 0x956b10d8 dispatch_once + 31

16/09/2015 18:50:18.432 Office365Service[2924]: 4 CarbonCore 0x97dd369d _Gestalt_SystemVersion + 1050

16/09/2015 18:50:18.432 Office365Service[2924]: 5 CarbonCore 0x97dd27c0 Gestalt + 150

16/09/2015 18:50:18.433 Office365Service[2924]: 6 Office365Service 0x00058997 Office365Service + 358807

16/09/2015 18:51:23.000 kernel[0]: ZBAVKauth: pending entry not found for [0xffffff80382f51e0]

16/09/2015 18:51:23.000 kernel[0]: ZBAVKauth: [0xffffff80382f51e0] entry is missing

16/09/2015 18:52:51.000 kernel[0]: ZBAVKauth: pending entry not found for [0xffffff80382f51e0]

16/09/2015 18:52:51.000 kernel[0]: ZBAVKauth: [0xffffff80382f51e0] entry is missing

16/09/2015 18:59:46.313 loginwindow[92]: magsafeStateChanged state changed old 1 new 2

Sep 17, 2015 7:21 AM in response to johnemoff

"MacKeeper" is a scam with only one useful feature: it deletes itself.

First, back up all data.

Note: These instructions apply to the version of the product that I downloaded and tested in early 2012. I can't be sure that they apply to other versions.

If you have incompletely removed MacKeeper—for example, by dragging the application to the Trash and immediately emptying—then you'll have to reinstall it and start over.

IMPORTANT: "MacKeeper" has what the developer calls an “encryption” feature. In my tests, I didn't try to verify what this feature really does. If you used it to “encrypt” any of your files, “decrypt” them before you uninstall, or (preferably) restore the files from backups made before they were “encrypted.” As the developer is not trustworthy, you should assume that the "decrypted" files are corrupt unless proven otherwise.

In the Finder, select

Go Applications

from the menu bar, or press the key combination shift-command-A. The "MacKeeper" application is in the folder that opens. Quit it if it's running, then drag it to the Trash. You'll be prompted for your login password. Click the Uninstall MacKeeper button in the dialog that appears. All the other functional components of the software will be deleted. Restart the computer and empty the Trash.

Quit MacKeeper before dragging it to the Trash.

Let MacKeeper delete its other components before you empty the Trash.

Don't try to drag MacKeeper from the Dock or the Launchpad to the Trash.

Don't try to remove MacKeeper while running in safe mode.

Sep 17, 2015 8:10 AM in response to johnemoff

How to maintain a Mac

Make two or more backups of all your files

One backup is not enough to be safe. A copy of a backup doesn't count as another backup; all backups must be made directly from the original data.

Keep at least one backup off site at all times in case of disaster. Backing up to a cloud-data service is one way to accomplish this, but don't rely exclusively on such backups.

In fact, don’t rely exclusively on any single backup method, such as Time Machine.

If you get an indication that a backup has failed, don't ignore it.

Keep your software up to date

In the App Store or Software Update preference pane (depending on the OS version), you can configure automatic notifications of updates to OS X and other Mac App Store products. Some third-party applications from other sources have a similar feature, if you don’t mind letting them phone home. Otherwise you have to check yourself on a regular basis.

Keeping up to date is especially important for complex software that modifies the operating system, such as device drivers. Don't install such modifications unless they're absolutely necessary. Remove them when they are no longer needed. Before installing any Apple update, you must check that all system modifications that you use are compatible. Incompatibility with third-party software is by far the most common cause of difficulties with system updates.

Don't install crapware

...such as “themes,” "haxies," “add-ons,” “toolbars,” “enhancers," “optimizers,” “accelerators,” "boosters," “extenders,” “cleaners,” "doctors," "tune-ups," “defragmenters,” “firewalls,” "barriers," “guardians,” “defenders,” “protectors,” most “plugins,” "virus scanners,” "disk tools," or "utilities." With very few exceptions, such stuff is useless or worse than useless. Above all, avoid any software that purports to change the look and feel of the user interface.

It's not much of an exaggeration to say that the whole "utility" software industry for the Mac is a fraud on consumers. The most extreme examples are the "CleanMyMac," "TuneUpMyMac," and “MacKeeper” scams, but there are many others.

As a rule, you should avoid software that changes the way other software works. Plugins for Photoshop and similar programs are an obvious exception to this rule. Safari extensions, and perhaps the equivalent for other web browsers, are a partial exception. Most are safe, and they're easy to get rid of if they don't work. Some may cause the browser to crash or otherwise malfunction. Some are malicious. Use with caution, and install only well-known extensions from relatively trustworthy sources, such as the Safari Extensions Gallery.

Only install software that is useful to you, not (as you imagine) to the computer. For example, a word processor is useful for writing. A video editor is useful for making movies. A game is useful for fun. But a "cache cleaner" isn't useful for anything. You didn't buy a computer so you could clean caches.

Never install any third-party software unless you know how to uninstall it. Otherwise you may create problems that are very hard to solve. Do not rely on "utilities" such as "AppCleaner" and the like that purport to remove software.

Don't install bad, conflicting, or unnecessary fonts

Whenever you install new fonts, use the validation feature of the built-in Font Book application to make sure the fonts aren't defective and don't conflict with each other or with others that you already have. See the built-in help and this support article for instructions.

Deactivate or remove fonts that you don't really need to speed up application launching.

Avoid malware

"Malware" is malicious software that circulates on the Internet. This kind of attack on OS X was once so rare that it was hardly a concern, but it's now increasingly common and dangerous.

There is some built-in protection against malware, but you can’t rely on it—the attackers are always at least one day ahead of the defense. You can’t rely on third-party "anti-virus" products for protection either. What you can rely on is common-sense awareness—not paranoia, which only makes you more vulnerable.

Never install software from an untrustworthy or unknown source. If in doubt, do some research. Any website that prompts you to install a “codec” or “plugin” that comes from the same site, or an unknown site, is untrustworthy. Software with a corporate brand, such as Adobe Flash Player, must come directly from the developer's website. No intermediary is acceptable, and don’t trust links unless you know how to parse them. Any file that is automatically downloaded from the web, without your having requested it, should go straight into the Trash. A web page that tells you that your computer has a “virus,” or that anything else is wrong with it, is a scam.

In OS X 10.7.5 or later, downloaded applications and Installer packages that have not been digitally signed by a developer registered with Apple are blocked from loading by default. The block can be overridden, but think carefully before you do so.

Because of recurring security issues in Java, it’s best to disable it in your web browsers, if it’s installed. Few websites have Java content nowadays, so you won’t be missing much. This action is mandatory if you’re running any version of OS X older than 10.6.8 with the latest Java update. Note: Java has nothing to do with JavaScript, despite the similar names. Don't install Java unless you're sure you need it. Most people don't.

Don't fill up your disk or SSD

A common mistake is adding more and more large files to your home folder until you start to get warnings that you're out of space, which may be followed in short order by a startup failure. This is more prone to happen on the newer Macs that come with an internal SSD instead of the traditional hard drive. The drive can be very nearly full before you become aware of the problem.

While it's not true that you should or must keep any particular percentage of space free, you should monitor your storage use and make sure you're not in immediate danger of using it up. According to Apple documentation, you need at least 9 GB of free space on the startup volume for normal operation.

If storage space is running low, use a tool such as OmniDiskSweeperto explore the volume and find out what's taking up the most space. Move seldom-used large files to secondary storage.

Relax, don’t do it

Besides the above, no routine maintenance is necessary or beneficial for the vast majority of users; specifically not “cleaning caches,” “zapping the PRAM,” "resetting the SMC," “rebuilding the directory,” "defragmenting the drive," “running periodic scripts,” “dumping logs,” "deleting temp files," “scanning for viruses,” "purging memory," "checking for bad blocks," "testing the hardware," or “repairing permissions.” Such measures are either completely pointless or are useful only for solving problems, not for prevention.

To use a Mac effectively, you have to free yourself from the Windows mindset that every computer needs regular downtime for maintenance such as "defragging" and "registry cleaning." Those concepts do not apply to the Mac platform.

A well-designed computing device is not something you should have to think about much. It should be an almost transparent medium through which you communicate, work, and play. If you want a machine that needs a lot of attention just to keep going, use a PC, or collect antique cars.

The very height of futility is running an expensive third-party application called “Disk Warrior” when nothing is wrong, or even when something is wrong and you have backups, which you must have. Disk Warrior is a data-salvage tool, not a maintenance tool, and you will never need it if your backups are adequate. Don’t waste money on it or anything like it.

Sep 18, 2015 3:38 AM in response to johnemoff

Hi


Removing Mackeeper hasn't fixed the back up fail issue.


18/09/2015 11:18:30.232 com.apple.backupd[160]: Starting manual backup

18/09/2015 11:18:39.734 SonyAutoLauncher[281]: Enum Begin!

18/09/2015 11:18:42.482 SonyAutoLauncher[281]: Device path: (null)

18/09/2015 11:18:42.482 SonyAutoLauncher[281]: Device path: (null)

18/09/2015 11:18:42.483 SonyAutoLauncher[281]: Device path: (null)

18/09/2015 11:18:42.483 SonyAutoLauncher[281]: Enum End!

18/09/2015 11:18:44.003 SonyAutoLauncher[281]: Enum Begin!

18/09/2015 11:18:45.000 kernel[0]: hfs: mounted Time Machine Backups on device disk3s2

18/09/2015 11:18:45.658 SonyAutoLauncher[281]: Device path: /Volumes/Time Machine Backups

18/09/2015 11:18:46.764 com.apple.backupd[160]: Disk image /Volumes/Data/xxxxs MacBook Pro.sparsebundle mounted at: /Volumes/Time Machine Backups

18/09/2015 11:18:47.183 com.apple.backupd[160]: Network destination already mounted at: /Volumes/Data

18/09/2015 11:18:49.206 mds[56]: (Volume.Error:880) Root store set to FSOnly with matching create! (loaded:1)

18/09/2015 11:18:54.123 com.apple.backupd[160]: Disk image already attached: /Volumes/Data/John’s MacBook Pro.sparsebundle, DIHLDiskImageAttach returned: 35

18/09/2015 11:18:56.014 com.apple.backupd[160]: Disk image /Volumes/Data/John’s MacBook Pro.sparsebundle mounted at: /Volumes/Time Machine Backups

18/09/2015 11:18:57.274 com.apple.backupd[160]: Backing up to /dev/disk3s2: /Volumes/Time Machine Backups/Backups.backupdb

18/09/2015 11:19:06.396 SonyAutoLauncher[281]: Device path: (null)

18/09/2015 11:19:06.397 SonyAutoLauncher[281]: Enum End!

18/09/2015 11:19:08.263 mds_stores[191]: (Permissions.Error:1719) Failed stat on perm journal with error 9

18/09/2015 11:19:08.943 com.apple.backupd[160]: Failed to create progress log file at path:/Volumes/Time Machine Backups/Backups.backupdb/John’s MacBook Pro/2015-09-18-110604.inProgress/.Backup.464264348.942112.log.

18/09/2015 11:19:08.945 com.apple.backupd[160]: Event store UUIDs don't match for volume: Macintosh HD

18/09/2015 11:19:15.473 com.apple.backupd[160]: Error: (Error Domain=NSCocoaErrorDomain Code=4 "The file “BD1DB9F4-9CC1-4C19-8D50-74D5F56BD082” doesn’t exist." UserInfo=0x7fd80b9cb4d0 {NSFilePath=/Volumes/Time Machine Backups/Backups.backupdb/John’s MacBook Pro/2015-09-18-110604.inProgress/BD1DB9F4-9CC1-4C19-8D50-74D5F56BD082, NSUnderlyingError=0x7fd80b9cc290 "The operation couldn’t be completed. No such file or directory"}) Creating directory BD1DB9F4-9CC1-4C19-8D50-74D5F56BD082

18/09/2015 11:19:15.474 com.apple.backupd[160]: Failed to make snapshot.

18/09/2015 11:19:15.503 com.apple.backupd[160]: Backup failed with error 2: 2

18/09/2015 11:19:25.000 kernel[0]: hfs: unmount initiated on Time Machine Backups on device disk3s2

18/09/2015 11:19:28.124 com.apple.backupd[160]: Ejected Time Machine disk image: /Volumes/Data/Jxxxxs MacBook Pro.sparsebundle

18/09/2015 11:19:28.000 kernel[0]: AFP_VFS afpfs_unmount: /Volumes/Data, flags 0, pid 511

18/09/2015 11:19:28.000 kernel[0]: ASP_TCP Disconnect: triggering reconnect by bumping reconnTrigger from curr value 0 on so 0xffffff8032cb87b0

18/09/2015 11:19:28.000 kernel[0]: ASP_TCP Detach: Reply queue not empty?

18/09/2015 11:19:28.530 com.apple.backupd[160]: Ejected Time Machine network volume.

18/09/2015 11:20:32.677 mds_stores[191]: (SecureStore.Error:157) Access token 8 changed uid from -1 to 501

18/09/2015 11:20:38.237 com.apple.xpc.launchd[1]: (com.apple.imfoundation.IMRemoteURLConnectionAgent) The _DirtyJetsamMemoryLimit key is not available on this platform.

18/09/2015 11:20:40.000 kernel[0]: Safari (map: 0xffffff8035bb9000) triggered DYLD shared region unnest for map: 0xffffff8035bb9000, region 0x7fff90600000->0x7fff90800000. While not abnormal for debuggers, this increases system memory footprint until the target exits.

18/09/2015 11:20:53.222 storeaccountd[324]: AccountServiceDelegate: Accepting new connection <NSXPCConnection: 0x7fd878558790> connection from pid 522 with interface <AccountServiceInterface: 0x7fd878478470> (PID 522)

18/09/2015 11:20:58.954 com.apple.xpc.launchd[1]: (com.apple.imfoundation.IMRemoteURLConnectionAgent) The _DirtyJetsamMemoryLimit key is not available on this platform.

18/09/2015 11:21:03.000 kernel[0]: com.apple.WebKit (map: 0xffffff80328d3b40) triggered DYLD shared region unnest for map: 0xffffff80328d3b40, region 0x7fff8b800000->0x7fff8ba00000. While not abnormal for debuggers, this increases system memory footprint until the target exits.

18/09/2015 11:21:08.705 com.apple.xpc.launchd[1]: (com.apple.imfoundation.IMRemoteURLConnectionAgent) The _DirtyJetsamMemoryLimit key is not available on this platform.

18/09/2015 11:21:17.601 WindowServer[154]: disable_update_timeout: UI updates were forcibly disabled by application "Safari" for over 1.00 seconds. Server has re-enabled them.

18/09/2015 11:21:18.452 WindowServer[154]: common_reenable_update: UI updates were finally reenabled by application "Safari" after 1.85 seconds (server forcibly re-enabled them after 1.00 seconds)

18/09/2015 11:21:23.000 kernel[0]: com.apple.WebKit (map: 0xffffff80328d3960) triggered DYLD shared region unnest for map: 0xffffff80328d3960, region 0x7fff8b800000->0x7fff8ba00000. While not abnormal for debuggers, this increases system memory footprint until the target exits.

18/09/2015 11:21:24.912 Safari[522]: CGWindowContextCreate: failed to create window context delegate.

18/09/2015 11:21:24.913 Safari[522]: CGWindowContextCreate: failed to create window context delegate.

18/09/2015 11:21:24.976 Safari[522]: CGContextSaveGState: invalid context 0x0. This is a serious error. This application, or a library it uses, is using an invalid context and is thereby contributing to an overall degradation of system stability and reliability. This notice is a courtesy: please fix this problem. It will become a fatal error in an upcoming update.

18/09/2015 11:21:26.695 Safari[522]: CGContextResetCTM: invalid context 0x0. This is a serious error. This application, or a library it uses, is using an invalid context and is thereby contributing to an overall degradation of system stability and reliability. This notice is a courtesy: please fix this problem. It will become a fatal error in an upcoming update.

18/09/2015 11:21:26.702 Safari[522]: CGContextResetClip: invalid context 0x0. This is a serious error. This application, or a library it uses, is using an invalid context and is thereby contributing to an overall degradation of system stability and reliability. This notice is a courtesy: please fix this problem. It will become a fatal error in an upcoming update.

18/09/2015 11:21:26.707 Safari[522]: CGContextTranslateCTM: invalid context 0x0. This is a serious error. This application, or a library it uses, is using an invalid context and is thereby contributing to an overall degradation of system stability and reliability. This notice is a courtesy: please fix this problem. It will become a fatal error in an upcoming update.

18/09/2015 11:21:26.787 Safari[522]: CGContextScaleCTM: invalid context 0x0. This is a serious error. This application, or a library it uses, is using an invalid context and is thereby contributing to an overall degradation of system stability and reliability. This notice is a courtesy: please fix this problem. It will become a fatal error in an upcoming update.

18/09/2015 11:21:26.793 Safari[522]: CGContextSaveGState: invalid context 0x0. This is a serious error. This application, or a library it uses, is using an invalid context and is thereby contributing to an overall degradation of system stability and reliability. This notice is a courtesy: please fix this problem. It will become a fatal error in an upcoming update.

18/09/2015 11:21:26.797 Safari[522]: clip: invalid context 0x0. This is a serious error. This application, or a library it uses, is using an invalid context and is thereby contributing to an overall degradation of system stability and reliability. This notice is a courtesy: please fix this problem. It will become a fatal error in an upcoming update.

18/09/2015 11:21:26.801 Safari[522]: CGContextRestoreGState: invalid context 0x0. This is a serious error. This application, or a library it uses, is using an invalid context and is thereby contributing to an overall degradation of system stability and reliability. This notice is a courtesy: please fix this problem. It will become a fatal error in an upcoming update.

18/09/2015 11:21:26.805 Safari[522]: CGContextRestoreGState: invalid context 0x0. This is a serious error. This application, or a library it uses, is using an invalid context and is thereby contributing to an overall degradation of system stability and reliability. This notice is a courtesy: please fix this problem. It will become a fatal error in an upcoming update.

18/09/2015 11:21:26.809 Safari[522]: CGContextSynchronize: invalid context 0x0. This is a serious error. This application, or a library it uses, is using an invalid context and is thereby contributing to an overall degradation of system stability and reliability. This notice is a courtesy: please fix this problem. It will become a fatal error in an upcoming update.

18/09/2015 11:21:36.048 SystemUIServer[231]: Attempt to use XPC with a MachService that has HideUntilCheckIn set. This will result in unpredictable behavior: com.apple.backupd.status.xpc

18/09/2015 11:21:37.112 WindowServer[154]: disable_update_timeout: UI updates were forcibly disabled by application "Mail" for over 1.00 seconds. Server has re-enabled them.

18/09/2015 11:21:39.518 Mail[525]: CFNetwork SSLHandshake failed (-9806)

18/09/2015 11:21:49.090 WindowServer[154]: common_reenable_update: UI updates were finally reenabled by application "Mail" after 12.98 seconds (server forcibly re-enabled them after 1.00 seconds)

18/09/2015 11:21:51.306 com.apple.xpc.launchd[1]: (com.apple.imfoundation.IMRemoteURLConnectionAgent) The _DirtyJetsamMemoryLimit key is not available on this platform.

18/09/2015 11:21:51.306 com.apple.xpc.launchd[1]: (com.apple.imfoundation.IMRemoteURLConnectionAgent) The _DirtyJetsamMemoryLimit key is not available on this platform.

18/09/2015 11:22:08.180 Mail[525]: -[MCContactsManager _asyncLoadContacts]: Count's pick a designated name contact out of 2 for: <CNContact: 0x7f94c95db080: identifier=<CNContactIdentifier: 0x608000218430: stringValue=7C0C82F0-C5CF-4B60-BAC7-A6D3F550F3D0:ABPerson>, firstName=Hannah, lastName=(null), companyName=(null), phoneNumbers=(

"<CNLabeledValue: 0x60800083aa40: identifier=BB6C08A8-3E4B-4425-BA6C-EFBD56AA231A, label=_$!<Mobile>!$_, value=+447810413856>"

), emailAddresses=(

), postalAddresses=(

)>. Using the first contact out of the group

18/09/2015 11:22:14.000 kernel[0]: com.apple.WebKit (map: 0xffffff80328d3870) triggered DYLD shared region unnest for map: 0xffffff80328d3870, region 0x7fff8b800000->0x7fff8ba00000. While not abnormal for debuggers, this increases system memory footprint until the target exits.

18/09/2015 11:22:22.000 kernel[0]: com.apple.WebKit (map: 0xffffff80354c9c30) triggered DYLD shared region unnest for map: 0xffffff80354c9c30, region 0x7fff8b800000->0x7fff8ba00000. While not abnormal for debuggers, this increases system memory footprint until the target exits.

18/09/2015 11:22:22.651 com.apple.xpc.launchd[1]: (com.apple.imfoundation.IMRemoteURLConnectionAgent) The _DirtyJetsamMemoryLimit key is not available on this platform.

18/09/2015 11:22:28.971 com.apple.xpc.launchd[1]: (com.apple.imfoundation.IMRemoteURLConnectionAgent) The _DirtyJetsamMemoryLimit key is not available on this platform.

18/09/2015 11:22:28.973 com.apple.xpc.launchd[1]: (com.apple.imfoundation.IMRemoteURLConnectionAgent) The _DirtyJetsamMemoryLimit key is not available on this platform.

18/09/2015 11:22:42.191 recentsd[542]: Failed to get Mail account information in a timely manner

18/09/2015 11:22:43.102 com.apple.xpc.launchd[1]: (com.apple.imfoundation.IMRemoteURLConnectionAgent) The _DirtyJetsamMemoryLimit key is not available on this platform.

18/09/2015 11:22:47.795 com.apple.xpc.launchd[1]: (com.apple.imfoundation.IMRemoteURLConnectionAgent) The _DirtyJetsamMemoryLimit key is not available on this platform.

18/09/2015 11:23:02.004 ntpd[183]: FREQ state ignoring +0.000692 s

18/09/2015 11:24:11.000 kernel[0]: com.apple.WebKit (map: 0xffffff80328d35a0) triggered DYLD shared region unnest for map: 0xffffff80328d35a0, region 0x7fff8b800000->0x7fff8ba00000. While not abnormal for debuggers, this increases system memory footprint until the target exits.

18/09/2015 11:24:21.055 com.apple.xpc.launchd[1]: (com.apple.imfoundation.IMRemoteURLConnectionAgent) The _DirtyJetsamMemoryLimit key is not available on this platform.

18/09/2015 11:24:24.783 locationd[166]: Couldn't find a requirement string for masquerading client /System/Library/PrivateFrameworks/Parsec.framework

18/09/2015 11:24:24.796 locationd[166]: could not get apple languages array, assuming english

18/09/2015 11:25:03.253 nsurlstoraged[310]: Process 532 does not have access to path /Users/johnemoffat/Library/Caches/com.apple.syncdefaultsd/Cache.db

Sep 18, 2015 10:20 AM in response to johnemoff

This procedure is a diagnostic test. It makes no changes to your data.

First, mount the Time Capsule volume, if it's not already mounted, by clicking it in the sidebar of a Finder window.

Please triple-click anywhere in the line below on this page to select it:

ls -@Oaen /V*/*/Backups.backupdb | pbcopy

Copy the selected text to the Clipboard by pressing the key combination command-C.

Launch the built-in Terminal application in any of the following ways:

☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)

☞ In the Finder, select Go Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.

☞ Open LaunchPad and start typing the name.

Paste into the Terminal window by pressing the key combination command-V. I've tested these instructions only with the Safari web browser. If you use another browser, you may have to press the return key after pasting.

Wait for a new line ending in a dollar sign ($) to appear below what you entered.

The output of the command will be automatically copied to the Clipboard. If the command produced no output, the Clipboard will be empty. Paste into a reply to this message.

The Terminal window doesn't show the output. Please don't copy anything from there.

If any personal information appears in the output, anonymize before posting, but don’t remove the context.

Sep 21, 2015 7:35 AM in response to Linc Davis

I'm getting the message command not found,


vbvb-MacBook-Pro:~ fhdjsfja ls -@Oaen /V*/*/Backups.backupdb | pbcopy

jhj-MacBook-Pro:~ kkjhgg$ total 0

-bash: total: command not found

njhjhj-MacBook-Pro:~ gghfghj$ drwxrwxrwx@ 0 0 0 - 0 21 Sep 15:20 .

-bash: drwxrwxrwx@: command not found

hgh-MacBook-Pro:~ xxxxxxxx$ com.apple.backupdelta.IsMobileBackup3

-bash: com.apple.backupdelta.IsMobileBackup3: command not found

xxxxx-MacBook-Pro:~ xxxxxxxx$ drwxrwxrwx 0 0 0 - 0 21 Sep 15:20 ..

-bash: drwxrwxrwx: command not found

Jgggg-MacBook-Pro:~ jxxxxxxx$ drwxrwxrwx@ 0 0 0 - 0 21 Sep 15:20 vvvvv’s MacBook Pro

-bash: drwxrwxrwx@: command not found

hhhhh-MacBook-Pro:~ hhhhhhhh$ com.apple.backupd.BackupMachineAddress17

-bash: com.apple.backupd.BackupMachineAddress17: command not found

hhhhh-MacBook-Pro:~ xxxxxxxxxx$ com.apple.backupd.HostUUID36

-bash: com.apple.backupd.HostUUID36: command not found

xxxx-MacBook-Pro:~ xxxxxxxx$ com.apple.backupdelta.IsMobileBackup3

-bash: com.apple.backupdelta.IsMobileBackup3: command not found

Jvvvv-MacBook-Pro:~ vvvvvvvvvv$

Oct 31, 2015 5:32 AM in response to Linc Davis

10/31/15 8:13:16.541 AM com.apple.backupd[1426]: Starting automatic backup

10/31/15 8:13:16.000 AM kernel[0]: disk1s2: I/O error.

10/31/15 8:13:16.000 AM kernel[0]: disk1s2: I/O error.

10/31/15 8:13:16.572 AM com.apple.backupd[1426]: Error determining directory contents for /Volumes/FranS: Error Domain=NSCocoaErrorDomain Code=256 "The file “FranS” couldn’t be opened." UserInfo={NSFilePath=/Volumes/FranS, NSUserStringVariant=(

Folder

), NSUnderlyingError=0x7feac942fb70 {Error Domain=NSOSStatusErrorDomain Code=-36 "ioErr: I/O error (bummers)"}}

10/31/15 8:13:18.000 AM kernel[0]: disk1s2: I/O error.

10/31/15 8:13:18.000 AM kernel[0]: disk1s2: I/O error.

10/31/15 8:13:22.000 AM kernel[0]: disk1s2: I/O error.

10/31/15 8:13:22.000 AM kernel[0]: disk1s2: I/O error.

10/31/15 8:13:22.000 AM kernel[0]: disk1s2: I/O error.

10/31/15 8:13:22.000 AM kernel[0]: disk1s2: I/O error.

10/31/15 8:13:22.000 AM kernel[0]: disk1s2: I/O error.

10/31/15 8:13:22.000 AM kernel[0]: disk1s2: I/O error.

10/31/15 8:13:22.000 AM kernel[0]: disk1s2: I/O error.

10/31/15 8:13:22.000 AM kernel[0]: disk1s2: I/O error.

10/31/15 8:13:22.000 AM kernel[0]: disk1s2: I/O error.

10/31/15 8:13:22.000 AM kernel[0]: disk1s2: I/O error.

10/31/15 8:13:22.000 AM kernel[0]: disk1s2: I/O error.

10/31/15 8:13:22.000 AM kernel[0]: disk1s2: I/O error.

10/31/15 8:13:22.000 AM kernel[0]: disk1s2: I/O error.

10/31/15 8:13:22.000 AM kernel[0]: disk1s2: I/O error.

10/31/15 8:13:22.000 AM kernel[0]: disk1s2: I/O error.

10/31/15 8:13:22.891 AM com.apple.backupd[1426]: Backing up to /dev/disk1s2: /Volumes/FranS/Backups.backupdb

10/31/15 8:13:25.888 AM com.apple.xpc.launchd[1]: (com.apple.quicklook[1428]) Endpoint has been activated through legacy launch(3) APIs. Please switch to XPC or bootstrap_check_in(): com.apple.quicklook

10/31/15 8:13:29.736 AM Console[1430]: Failed to connect (_consoleX) outlet from (NSApplication) to (ConsoleX): missing setter or instance variable

10/31/15 8:13:35.000 AM kernel[0]: disk1s2: I/O error.

10/31/15 8:13:35.000 AM kernel[0]: disk1s2: I/O error.

10/31/15 8:13:35.000 AM kernel[0]: disk1s2: I/O error.

10/31/15 8:13:35.000 AM kernel[0]: disk1s2: I/O error.

10/31/15 8:13:35.000 AM kernel[0]: disk1s2: I/O error.

10/31/15 8:13:35.841 AM com.apple.backupd[1426]: Error -36 applying backup protections to /Volumes/FranS/Backups.backupdb/MacBook Pro

10/31/15 8:13:35.000 AM kernel[0]: disk1s2: I/O error.

10/31/15 8:13:35.851 AM com.apple.backupd[1426]: Error: (22) setxattr for key:com.apple.backupd.HostUUID path:/Volumes/FranS/Backups.backupdb/MacBook Pro size:37

10/31/15 8:13:35.858 AM UserEventAgent[42]: Failed to send message because the port couldn't be created.

10/31/15 8:13:35.858 AM com.apple.backupd[1426]: Backup failed with error 2: 2

10/31/15 8:13:35.000 AM kernel[0]: disk1s2: I/O error.

10/31/15 8:13:35.000 AM kernel[0]: disk1s2: I/O error.

10/31/15 8:13:35.000 AM kernel[0]: disk1s2: I/O error.

10/31/15 8:13:35.000 AM kernel[0]: disk1s2: I/O error.

10/31/15 8:14:10.337 AM WindowServer[144]: _CGXRemoveWindowFromWindowMovementGroup: window 0x154 is not attached to window 0x156

10/31/15 8:14:21.111 AM WindowServer[144]: _CGXRemoveWindowFromWindowMovementGroup: window 0x154 is not attached to window 0x156

10/31/15 8:14:48.032 AM WindowServer[144]: _CGXRemoveWindowFromWindowMovementGroup: window 0x154 is not attached to window 0x156

10/31/15 8:14:48.342 AM sandboxd[126]: ([330]) softwareupdated(330) deny system-fsctl 0x682f

10/31/15 8:14:49.551 AM WindowServer[144]: _CGXRemoveWindowFromWindowMovementGroup: window 0x154 is not attached to window 0x156

10/31/15 8:22:49.000 AM syslogd[41]: ASL Sender Statistics

10/31/15 8:27:46.065 AM CalendarAgent[279]: [com.apple.calendar.store.log.caldav.coredav] [Refusing to parse response to PROPPATCH because of content-type: [text/html; charset=UTF-8].]

10/31/15 8:27:46.124 AM CalendarAgent[279]: [com.apple.calendar.store.log.caldav.coredav] [Refusing to parse response to PROPPATCH because of content-type: [text/html; charset=UTF-8].]

My Time machine Back up has stopped working with the error message "Unable to complete backup. An error occurred while creating the backup folder."

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