Time Machine completed a verification of your backups. To improve reliability, Time Machine must create a new backup for you.

Do you mean remove ALL third party software of all kinds? In other words remove Office, Acrobat Reader and so on? Or just things like anti virus etc? I have no anti-anything software or cleaner software. I did a disk erase on the TC which found an unrepairable disk, so now use an external plugged into the TC, which is now also bringing up the same error message, though I haven't wiped that disc and don't intend to, as it currently holds more than just a backup.

I think you're right that there is probably a software issue causing some problems as well (quite a few people seem to be reporting this issue) but I think mine is also mixed with a bad HDD inside the TC.

David, I am not sure about all third party software as I do not use any of those you mention. The likes of Office etc should have been Apple certified as they stock and sell them so you are probably OK with them. Acrobat is another matter, I don't think that it is stocked by Apple. I just use Preview for reading PDFs, and Apple software creates pdfs from other documents, however to edit pdfs something else is needed which you may find in the App store. I only need to use the Apple suite as it converts all its documents to Office style and pdfs to send to others. The Apple suite is perhaps not as powerful as Office, but I no longer need that complexity. What I have recounted in this discussion thread worked for me. My Time Capsule is now 6.5 years old and still working fine. Why not connect the external drive into the Mac to bypass the TC which may have the issue that is causing the verification failures? Perhaps book the TC into the Genius bar and let them have a look at it? If there is a fault they will find it and if it is within warranty replace it or even if it is outside warranty but at fault may still replace it. Any more is outside my ability as I do not have a Computer Science degree or OSX software depth of knowledge. I just love the fact that when I switch on what I have it just works and works first time. I have never had to reload any software update and I have updated everything since 2010, iMac, iPad, iPhone and Apple TV and they all synch with each other. This never happened before I moved to Apple. I won't bore you with my woes of maintaining the many PCs I have owned, and I built some of my own, never mind trying to get the conflicting software from dozens of providers to work properly and all the rest of the PC cleanup pfaff. Regards JR

In all the recent replies (Note,ber and December 2016) , I am experiencing all of the same!! This just started about two weeks ago?!?!?

Did something change just before that? Upgrade to Sierra, new devices on network, ...

It's doing the same for me, I thought the Time Machine Hard Drive was on the way out so purchased a new 2TB one which does exactly the same. I'm uninstalling some bits and pieces as mentioned above to see if that helps.

After getting this message daily for over a week I contacted Apple support. They recommended I do a "Soft " Reset" of the Time Capsule. That seems to have worked as I haven't had the message since (over 1 week).

https://support.apple.com/en-gb/HT201945

I have just noted an issue with my NAS backup using TimeMachine. Has anyone noticed data corruption of any of their drives or incremental backups just after installation of the Advanced Meter from the Gas Company, (in our case Southern California Gas)?

This occured just after the installation of the meter and the NAS is within 10 feet of where the smart meter is.

I removed a version of ClamXav and all appears to be well..

. . . . And it's back!!!

applekentuser wrote:

I removed a version of ClamXav and all appears to be well..

Not sure exactly what this had to do with anything, but just in case, you should never use any anti-malware software to quarantine or remove a file from any type of backup volume as it will almost certainly result in corruption.

ClamXav actually recommends against scanning your Time Machine / Time Capsule or other backup as it will simply take too long. For each and every backup on there, every file appears to be different even if they're identical, so the same files end up getting scanned over and over again.

It also provides only minimal protection as it's not possible to remove any malware that ClamXav finds - the only software that can modify a Time Machine/Time Capsule backup is Apple's Time Machine software itself.

The best course of action would be to scan your hard drive now, to remove any malware which might currently be present meaning that any infected files on your Time Machine/Time Capsule backups will simply get deleted in due course as your backup disk runs out of space. It may also be worth running a scan over your computer at a later stage if you ever have to recover it from backup.

Still no luck here. My other two computers have been and are still backing up fine to the Airport Extreme 3tb; my one computer still produces the same thing. I have attempted multiple avenues of deleting app just to see to no avail. I wish apple would do something about this. Considering how i no longer have any back ups of this computer and everyone I create a new backup, it crashes and produces the same verification error about once every 2 days.

Run an Etrecheck report and post it here so we can see what is running on your Mac.

EtreCheck version: 3.1.5 (343)

Report generated 2016-12-17 12:00:40

Download EtreCheck from https://etrecheck.com

Runtime 3:33

Performance: Good

Click the [Support] links for help with non-Apple products.

Click the [Details] links for more information about that line.

Problem: Other problem

Description:

Time Machine, See Community Discussion.

Hardware Information: ⓘ

iMac (21.5-inch, Late 2013)

[Technical Specifications] - [User Guide] - [Warranty & Service]

iMac - model: iMac14,3

1 2.9 GHz Intel Core i5 (i5-4570S) CPU: 4-core

8 GB RAM Upgradeable - [Instructions]

BANK 0/DIMM0

4 GB DDR3 1600 MHz ok

BANK 1/DIMM0

4 GB DDR3 1600 MHz ok

Bluetooth: Good - Handoff/Airdrop2 supported

Wireless: en1: 802.11 a/b/g/n/ac

Video Information: ⓘ

NVIDIA GeForce GT 750M - VRAM: 1024 MB

iMac 1920 x 1080

LG IPS FULLHD 1920 x 1080

System Software: ⓘ

macOS Sierra 10.12.2 (16C67) - Time since boot: about one day

Disk Information: ⓘ

APPLE HDD HTS541010A9E662 disk0 : (1 TB) (Rotational)

[Show SMART report]

EFI (disk0s1) /private/var/tmp/MPQTBXBO : 210 MB (182 MB free)

Recovery HD (disk0s3) <not mounted> [Recovery]: 650 MB

Macintosh HD (disk1) / [Startup]: 998.98 GB (869.54 GB free)

Core Storage: disk0s2 999.35 GB Online

USB Information: ⓘ

LaCie d2 TBT2 USB 3.0

Apple Inc. BRCM20702 Hub

Apple Inc. Bluetooth USB Host Controller

Apple Inc. FaceTime HD Camera (Built-in)

Apple, Inc. Keyboard Hub

Apple Inc. Apple Keyboard

Logitech Gaming Mouse G502

Thunderbolt Information: ⓘ

Apple Inc. thunderbolt_bus

Gatekeeper: ⓘ

Mac App Store and identified developers

Kernel Extensions: ⓘ

/Library/Extensions

[loaded] com.driver.LogJoystick (2.0 - SDK 10.8 - 2016-12-15) [Support]

[loaded] com.kairos.driver.DuetDisplay (1.2.0 - SDK 10.11 - 2016-12-15) [Support]

[not loaded] com.logitech.driver.LogiGamingMouseFilter (1.0 - SDK 10.8 - 2016-12-15) [Support]

System Launch Agents: ⓘ

[not loaded] 7 Apple tasks

[loaded] 166 Apple tasks

[running] 107 Apple tasks

System Launch Daemons: ⓘ

[not loaded] 30 Apple tasks

[loaded] 162 Apple tasks

[running] 121 Apple tasks

Launch Agents: ⓘ

[not loaded] com.adobe.AAM.Updater-1.0.plist (2016-10-29) [Support]

[failed] com.adobe.ARMDCHelper.cc24aef4a1b90ed56a725c38014c95072f92651fb65e1bf9c8e43c37a2 3d420d.plist (2016-10-13) [Support]

[loaded] com.adobe.AdobeCreativeCloud.plist (2016-10-29) [Support]

[loaded] com.google.keystone.agent.plist (2016-08-24) [Support]

[not loaded] com.oracle.java.Java-Updater.plist [Support]

[loaded] com.paragon-software.facebook.agent.plist (2016-07-17) [Support]

[loaded] com.paragon.updater.plist (2016-07-17) [Support]

Launch Daemons: ⓘ

[loaded] com.adobe.ARMDC.Communicator.plist (2016-10-13) [Support]

[loaded] com.adobe.ARMDC.SMJobBlessHelper.plist (2016-10-13) [Support]

[running] com.adobe.adobeupdatedaemon.plist (2016-10-29) [Support]

[running] com.adobe.agsservice.plist (2016-12-17) [Support]

[loaded] com.adobe.fpsaud.plist (2016-12-10) [Support]

[loaded] com.google.keystone.daemon.plist (2016-09-01) [Support]

[loaded] com.microsoft.autoupdate.helpertool.plist (2015-10-17) [Support]

[loaded] com.microsoft.office.licensingV2.helper.plist (2015-09-11) [Support]

[not loaded] com.oracle.java.Helper-Tool.plist [Support]

[loaded] com.rogueamoeba.instanton-agent.plist (2016-06-09) [Support]

[not loaded] org.virtualbox.startup.plist [Support]

User Launch Agents: ⓘ

[loaded] com.adobe.AAM.Updater-1.0.plist (2016-10-29) [Support]

[loaded] com.apple.serveralertproxy.plist (2016-09-17) [Support]

Internet Plug-ins: ⓘ

AdobePDFViewerNPAPI: 15.020.20042 - SDK 10.11 (2016-11-05) [Support]

FlashPlayer-10.6: 24.0.0.186 - SDK 10.9 (2016-12-13) [Support]

AdobePDFViewer: 15.020.20042 - SDK 10.11 (2016-11-05) [Support]

QuickTime Plugin: 7.7.3 (2016-12-15)

Flash Player: 24.0.0.186 - SDK 10.9 (2016-12-13) [Support]

AdobeAAMDetect: 3.0.0.0 - SDK 10.9 (2016-10-29) [Support]

3rd Party Preference Panes: ⓘ

Flash Player (2016-12-10) [Support]

FUSE (2016-12-01) [Support]

Time Machine: ⓘ

Skip System Files: NO

Mobile backups: OFF

Auto backup: YES

Volumes being backed up:

Macintosh HD: Disk size: 998.98 GB Disk used: 129.45 GB

Destinations:

Time_Machine [Network]

Total size: 0 B

Total number of backups: 0

Oldest backup: -

Last backup: -

Size of backup disk: Too small

Backup size 0 B < (Disk used 129.45 GB X 3)

Top Processes by CPU: ⓘ

5% mdworker(30)

4% fontd

3% kernel_task

3% WindowServer

1% suggestd

Top Processes by Memory: ⓘ

857 MB kernel_task

541 MB mdworker(30)

360 MB mds_stores

172 MB WindowServer

131 MB Finder

Virtual Memory Information: ⓘ

3.75 GB Available RAM

1.30 GB Free RAM

4.25 GB Used RAM

2.45 GB Cached files

73 MB Swap Used

Diagnostics Information: ⓘ

Dec 17, 2016, 10:47:04 AM /Library/Logs/DiagnosticReports/suggestd_2016-12-17-104704_[redacted].cpu_resou rce.diag [Details]

/System/Library/PrivateFrameworks/CoreSuggestions.framework/Versions/A/Support/ suggestd

Dec 16, 2016, 04:50:18 PM ~/Library/Logs/DiagnosticReports/com.apple.Safari.SafeBrowsing.Service_2016-12- 16-165018_[redacted].crash

/System/Library/PrivateFrameworks/SafariSafeBrowsing.framework/Versions/A/com.a pple.Safari.SafeBrowsing.Service

Dec 16, 2016, 03:48:02 PM ~/Library/Logs/DiagnosticReports/com.apple.Safari.SafeBrowsing.Service_2016-12- 16-154802_[redacted].crash

Dec 16, 2016, 02:45:42 PM ~/Library/Logs/DiagnosticReports/com.apple.Safari.SafeBrowsing.Service_2016-12- 16-144542_[redacted].crash

Dec 16, 2016, 01:43:17 PM ~/Library/Logs/DiagnosticReports/com.apple.Safari.SafeBrowsing.Service_2016-12- 16-134317_[redacted].crash

Dec 15, 2016, 09:50:26 PM /Library/Logs/DiagnosticReports/iTunes_2016-12-15-215026_[redacted].hang

/Applications/iTunes.app/Contents/MacOS/iTunes

Dec 15, 2016, 09:25:29 PM ~/Library/Logs/DiagnosticReports/Apple Configurator_2016-12-15-212529_[redacted].crash

/Applications/Apple Configurator.app/Contents/MacOS/Apple Configurator

Dec 15, 2016, 09:04:51 PM Self test - passed

Dec 15, 2016, 08:59:55 PM /Library/Logs/DiagnosticReports/mtmd_2016-12-15-205955_[redacted].crash

/System/Library/CoreServices/backupd.bundle/Contents/Resources/mtmd

Dec 15, 2016, 08:59:36 PM /Library/Logs/DiagnosticReports/emond_2016-12-15-205936_[redacted].crash

/sbin/emond

Dec 15, 2016, 08:59:36 PM /Library/Logs/DiagnosticReports/ReportCrash_2016-12-15-205936_[redacted].crash

/System/Library/CoreServices/ReportCrash

Dec 15, 2016, 05:10:31 PM ~/Library/Logs/DiagnosticReports/com.apple.Safari.SafeBrowsing.Service_2016-12- 15-171031_[redacted].crash

Dec 15, 2016, 03:40:10 PM ~/Library/Logs/DiagnosticReports/com.apple.Safari.SafeBrowsing.Service_2016-12- 15-154010_[redacted].crash

I don't know if it matter, but Time Machine was "Waiting to complete first backup" during this test/check.

Your Mac is still indexing, wait for that to finish then try again (mdworker is the indexing process)