Looks like no one’s replied in a while. To start the conversation again, simply ask a new question.

User profile for user: JJshenzhen
JJshenzhen Author
User level: Level 1
0 points

Time Machine/Capsule causes system to hang

Hi,

I have a brand new Macbook Air bought in April together with Time Capsule 2TB. It seems that there are auto backups made but each time I open time machine the screen shows all the prebious windows but I cannot leaf through the,, the system hangs.

Any Idea what I am doing wrong ? All latest firm- and software is installed.

Juergen from Shenzhen

MacBook Air, OS X Mountain Lion (10.8.4)

Posted on Jul 14, 2013 6:11 AM

Reply
9 replies
User profile for user: Linc Davis
Linc Davis
User level: Level 10
209,547 points

Jul 14, 2013 7:19 AM in response to JJshenzhen

If your backups are inaccessible, the first thing you need to do is start a new backup on an external hard drive. You should do that anyway. One backup is not enough to be safe, especially if it's on a Time Capsule.


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. Click Utilities, then Console in the icon grid.


Make sure the title of the Console window is All Messages. If it isn't, select All Messages from the SYSTEM LOG QUERIES menu on the left. If you don't see that menu, select

View ▹ Show Log List

from the menu bar.


Click the Clear Display icon in the toolbar. Then try the action that you're having trouble with again. Select any messages that appear in the Console window. Copy them to the Clipboard (command-C). Paste into a reply to this message (command-V).

When posting a log extract, be selective. In most cases, a few dozen lines are more than enough.

Please do not indiscriminately dump thousands of lines from the log into this discussion.

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

Reply
User profile for user: JJshenzhen
JJshenzhen Author
User level: Level 1
0 points

Jul 15, 2013 12:03 AM in response to Linc Davis

Hi Linc, thanks a lot for your message. When you say I should make more than one back up does that mean I should buy more of these Apple Time Capsules or can I use any external harddrive of appropriate size ?

As I am a complete newbee on Apple, I had no clue what you were talking about about but I tried to guess your meaning does below helps to get a better picture of my problem ?


15/7/13 2:57:54.533 PM esets_daemon[180]: summ[00b40600]: vdb=14395, agent=fac, name="/private/var/folders/zz/zyxvpxvq6csfxvn_n0000000000000/T/NFSVFSMeta.jWr5r S", virus="", action="", info="Event occurred on a newly created file.", avstatus="not scanned", hop="accepted"
15/7/13 2:57:55.632 PM com.apple.backupd[432]: Failed to mount disk image: Error Domain=com.apple.backupd.ErrorDomain Code=31 "The operation couldn’t be completed. (com.apple.backupd.ErrorDomain error 31.)" UserInfo=0x7fbb920106d0 {MessageParameters=(
"/Volumes/JJ Data-1/Juergens MacBook Air.sparsebundle"
)}
15/7/13 2:58:05.000 PM kernel[0]: memorystatus_thread: idle exiting pid 429 [cfprefsd]
15/7/13 2:58:05.626 PM WindowServer[98]: MPAccessSurfaceForDisplayDevice: Set up page flip mode on display 0x04273c00 device: 0x10385e110 isBackBuffered: 1 numComp: 3 numDisp: 3
15/7/13 2:58:06.634 PM diskarbitrationd[16]: Disk Utility [381]:17199 not responding.
15/7/13 2:58:06.865 PM com.apple.backupd[432]: Ejected Time Machine network volume.
15/7/13 2:58:06.867 PM com.apple.backupd[432]: Waiting 60 seconds and trying again.
15/7/13 2:58:07.000 PM kernel[0]: AFP_VFS afpfs_unmount: /Volumes/JJ Data-1, flags 0, pid 445
15/7/13 2:58:07.000 PM kernel[0]: AFP_VFS afpfs_unmount : We are the last mnt/sbmnt using volume /Volumes/JJ Data-1 0xffffff80706c6008
15/7/13 2:58:07.000 PM kernel[0]: AFP_VFS afpfs_unmount : We are the last volume using socket /Volumes/JJ Data-1 0xffffff80706c6008
15/7/13 2:58:07.000 PM kernel[0]: AFP_VFS afpfs_unmount : afpfs_DoReconnect sent signal for unmount to proceed
15/7/13 2:58:07.908 PM coreaudiod[224]: Disabled automatic stack shots because audio IO is active
15/7/13 2:58:09.139 PM coreaudiod[224]: Enabled automatic stack shots because audio IO is inactive
15/7/13 2:58:09.399 PM coreaudiod[224]: Disabled automatic stack shots because audio IO is active
15/7/13 2:58:09.574 PM coreaudiod[224]: Enabled automatic stack shots because audio IO is inactive
15/7/13 2:58:09.685 PM coreaudiod[224]: Disabled automatic stack shots because audio IO is active
15/7/13 2:58:09.860 PM coreaudiod[224]: Enabled automatic stack shots because audio IO is inactive
15/7/13 2:58:09.950 PM coreaudiod[224]: Disabled automatic stack shots because audio IO is active
15/7/13 2:58:10.125 PM coreaudiod[224]: Enabled automatic stack shots because audio IO is inactive
15/7/13 2:58:10.256 PM coreaudiod[224]: Disabled automatic stack shots because audio IO is active
15/7/13 2:58:10.430 PM coreaudiod[224]: Enabled automatic stack shots because audio IO is inactive
15/7/13 2:58:10.567 PM coreaudiod[224]: Disabled automatic stack shots because audio IO is active
15/7/13 2:58:10.741 PM coreaudiod[224]: Enabled automatic stack shots because audio IO is inactive
15/7/13 2:58:10.992 PM coreaudiod[224]: Disabled automatic stack shots because audio IO is active
15/7/13 2:58:11.166 PM coreaudiod[224]: Enabled automatic stack shots because audio IO is inactive
15/7/13 2:58:12.207 PM coreaudiod[224]: Disabled automatic stack shots because audio IO is active
15/7/13 2:58:12.382 PM coreaudiod[224]: Enabled automatic stack shots because audio IO is inactive
15/7/13 2:58:13.216 PM coreaudiod[224]: Disabled automatic stack shots because audio IO is active
15/7/13 2:58:13.390 PM coreaudiod[224]: Enabled automatic stack shots because audio IO is inactive
15/7/13 2:58:13.559 PM coreaudiod[224]: Disabled automatic stack shots because audio IO is active
15/7/13 2:58:13.733 PM coreaudiod[224]: Enabled automatic stack shots because audio IO is inactive
15/7/13 2:58:13.862 PM coreaudiod[224]: Disabled automatic stack shots because audio IO is active
15/7/13 2:58:14.037 PM coreaudiod[224]: Enabled automatic stack shots because audio IO is inactive
15/7/13 2:58:17.247 PM WindowServer[98]: MPAccessSurfaceForDisplayDevice: Set up page flip mode on display 0x04273c00 device: 0x10385e110 isBackBuffered: 1 numComp: 3 numDisp: 3
15/7/13 2:58:19.729 PM esets_daemon[180]: summ[00b40b00]: vdb=14395, agent=fac, name="/private/var/folders/bj/cvn1r8pd5bx5yjc7m35xzxf80000gn/C/com.apple.Launch Services-037501.csstore~", virus="", action="", info="Event occurred on a newly created file.", avstatus="not scanned", hop="accepted"
15/7/13 2:58:32.000 PM kernel[0]: [223|501] Finder async. scan: #'/Volumes/MobileBackups/Backups.backupdb/Juergens MacBook Air/2013-07-15-034247/Macintosh HD/Applications/Utilities/Adobe Flash Player Install Manager.app/Contents/Info.plist' act=0x00000002 rsn='ETYP1' ln='1591'
15/7/13 2:58:32.000 PM kernel[0]: [63|0] mtmfs async. scan: #'/private/var/folders/zz/zyxvpxvq6csfxvn_n0000000000000/T/NFSVFSMeta.KXnUBi' act=0x00000002 rsn='ETYP1' ln='1591'
15/7/13 2:58:32.000 PM kernel[0]: [375|501] Console async. scan: #'/private/var/log/asl/2013.07.14.G80.asl' act=0x00000002 rsn='ETYP1' ln='1591'
15/7/13 2:58:32.000 PM kernel[0]: nfs server localhost:/QJcQE3uYZqrmZzb5LzJi6K: not responding
15/7/13 2:58:32.000 PM kernel[0]: nfs server localhost:/QJcQE3uYZqrmZzb5LzJi6K: not responding
15/7/13 2:58:32.000 PM kernel[0]: [331|501] Microsoft Outloo async. scan: #'/Applications/Microsoft Office 2011/Office/MsgrLibClient.framework/Versions/14/Resources/MsgrLibClient.rsrc' act=0x00000002 rsn='ETYP1' ln='1591'
15/7/13 2:58:38.000 PM kernel[0]: [294|501] AirPort Utility async. scan: #'/private/etc/hosts' act=0x00000002 rsn='ETYP1' ln='1591'
15/7/13 2:58:38.000 PM kernel[0]: [294|501] AirPort Utility async. scan: #'/private/etc/hosts' act=0x00000002 rsn='ETYP1' ln='1591'
15/7/13 2:58:38.000 PM kernel[0]: [310|501] WDDriveUtilityHe async. scan: #'/private/var/folders/bj/cvn1r8pd5bx5yjc7m35xzxf80000gn/T/WDDriveUtilityHelper .app/Contents/Resources/MaverickDrives.plist' act=0x00000002 rsn='ETYP1' ln='1591'
15/7/13 2:58:44.000 PM kernel[0]: [63|0] mtmfs async. scan: #'/private/var/folders/zz/zyxvpxvq6csfxvn_n0000000000000/T/NFSVFSMeta.wjSTzG' act=0x00000002 rsn='ETYP1' ln='1591'
15/7/13 2:58:44.000 PM kernel[0]: nfs server localhost:/QJcQE3uYZqrmZzb5LzJi6K: is alive again
15/7/13 2:58:44.000 PM kernel[0]: nfs server localhost:/QJcQE3uYZqrmZzb5LzJi6K: is alive again
15/7/13 2:58:32.480 PM KernelEventAgent[70]: tid 00000000 received event(s) VQ_NOTRESP (1)
15/7/13 2:58:44.219 PM KernelEventAgent[70]: tid 00000000 received event(s) VQ_NOTRESP (1)
15/7/13 2:58:44.946 PM WindowServer[98]: MPAccessSurfaceForDisplayDevice: Set up page flip mode on display 0x04273c00 device: 0x10385e110 isBackBuffered: 1 numComp: 3 numDisp: 3
15/7/13 2:58:47.273 PM WindowServer[98]: MPAccessSurfaceForDisplayDevice: Set up page flip mode on display 0x04273c00 device: 0x10385e110 isBackBuffered: 1 numComp: 3 numDisp: 3
15/7/13 2:58:47.512 PM WindowServer[98]: Display 0x4273c00 released by conn 0x864b
15/7/13 2:58:48.301 PM coreaudiod[224]: Disabled automatic stack shots because audio IO is active
15/7/13 2:58:48.475 PM coreaudiod[224]: Enabled automatic stack shots because audio IO is inactive
15/7/13 2:58:51.303 PM esets_daemon[180]: summ[00b40900]: vdb=14395, agent=fac, name="/private/var/folders/zz/zyxvpxvq6csfxvn_n00000b400002s/C/mds/mdsObject.db _", virus="", action="", info="Event occurred on a newly created file.", avstatus="not scanned", hop="accepted"
15/7/13 2:58:51.313 PM esets_daemon[180]: summ[00b40c00]: vdb=14395, agent=fac, name="/private/var/folders/zz/zyxvpxvq6csfxvn_n00000b400002s/C/mds/mdsObject.db _", virus="", action="", info="Event occurred on a newly created file.", avstatus="not scanned", hop="accepted"
15/7/13 2:58:54.958 PM esets_daemon[180]: summ[00b40600]: vdb=14395, agent=fac, name="/private/var/folders/zz/zyxvpxvq6csfxvn_n0000000000000/T/NFSVFSMeta.8uWdD R", virus="", action="", info="Event occurred on a newly created file.", avstatus="not scanned", hop="accepted"
15/7/13 2:58:56.067 PM esets_daemon[180]: summ[00b40a00]: vdb=14395, agent=fac, name="/private/var/folders/zz/zyxvpxvq6csfxvn_n0000000000000/T/NFSVFSMeta.lfouo 6", virus="", action="", info="Event occurred on a newly created file.", avstatus="not scanned", hop="accepted"
15/7/13 2:58:57.263 PM esets_daemon[180]: summ[00b40a00]: vdb=14395, agent=fac, name="/private/var/folders/zz/zyxvpxvq6csfxvn_n0000000000000/T/NFSVFSMeta.gIXdG J", virus="", action="", info="Event occurred on a newly created file.", avstatus="not scanned", hop="accepted"
15/7/13 2:58:57.665 PM esets_daemon[180]: summ[00b40600]: vdb=14395, agent=fac, name="/private/var/folders/zz/zyxvpxvq6csfxvn_n0000000000000/T/NFSVFSMeta.hPYv3 r", virus="", action="", info="Event occurred on a newly created file.", avstatus="not scanned", hop="accepted"
15/7/13 2:58:59.480 PM coreaudiod[224]: Disabled automatic stack shots because audio IO is active
15/7/13 2:59:01.721 PM coreaudiod[224]: Enabled automatic stack shots because audio IO is inactive
15/7/13 2:59:06.925 PM com.apple.backupd[432]: Attempting to mount network destination URL: afp://Juergen%20von%20Aswegen;AUTH=SRP@GFT-Backup.local/JJ%20Data
15/7/13 2:59:07.654 PM esets_daemon[180]: summ[00b40600]: vdb=14395, agent=fac, name="/private/var/folders/bj/cvn1r8pd5bx5yjc7m35xzxf80000gn/C/mds/mdsObject.db ", virus="", action="", info="Event occurred on a newly created file.", avstatus="not scanned", hop="accepted"
15/7/13 2:59:07.000 PM kernel[0]: AFP_VFS afpfs_mount: /Volumes/JJ Data-1, pid 459
15/7/13 2:59:07.000 PM kernel[0]: AFP_VFS afpfs_mount : succeeded on volume 0xffffff807053b008 /Volumes/JJ Data-1 (error = 0, retval = 0)
15/7/13 2:59:07.664 PM com.apple.backupd[432]: Mounted network destination at mount point: /Volumes/JJ Data-1 using URL: afp://Juergen%20von%20Aswegen;AUTH=SRP@GFT-Backup.local/JJ%20Data
15/7/13 2:59:09.733 PM com.apple.backupd[432]: Disk image already attached: /Volumes/JJ Data-1/Juergens MacBook Air.sparsebundle, DIHLDiskImageAttach returned: 35
15/7/13 2:59:10.973 PM com.apple.backupd[432]: Failed to mount disk image: Error Domain=com.apple.backupd.ErrorDomain Code=31 "The operation couldn’t be completed. (com.apple.backupd.ErrorDomain error 31.)" UserInfo=0x7fbb9231f4c0 {MessageParameters=(
"/Volumes/JJ Data-1/Juergens MacBook Air.sparsebundle"
)}
15/7/13 2:59:11.000 PM kernel[0]: AFP_VFS afpfs_unmount: /Volumes/JJ Data-1, flags 0, pid 467
15/7/13 2:59:11.000 PM kernel[0]: AFP_VFS afpfs_unmount : We are the last mnt/sbmnt using volume /Volumes/JJ Data-1 0xffffff807053b008
15/7/13 2:59:11.000 PM kernel[0]: AFP_VFS afpfs_unmount : We are the last volume using socket /Volumes/JJ Data-1 0xffffff807053b008
15/7/13 2:59:11.000 PM kernel[0]: AFP_VFS afpfs_unmount : afpfs_DoReconnect sent signal for unmount to proceed
15/7/13 2:59:11.204 PM com.apple.backupd[432]: Ejected Time Machine network volume.
15/7/13 2:59:11.205 PM com.apple.backupd[432]: Waiting 60 seconds and trying again.
15/7/13 2:59:11.208 PM esets_daemon[180]: summ[00b40b00]: vdb=14395, agent=fac, name="/private/var/folders/bj/cvn1r8pd5bx5yjc7m35xzxf80000gn/C/mds/mdsObject.db ", virus="", action="", info="Event occurred on a newly created file.", avstatus="not scanned", hop="accepted"
15/7/13 2:59:45.939 PM esets_daemon[180]: summ[00b40400]: vdb=14395, agent=fac, name="/private/var/folders/bj/cvn1r8pd5bx5yjc7m35xzxf80000gn/C/mds/mdsObject.db ", virus="", action="", info="Event occurred on a newly created file.", avstatus="not scanned", hop="accepted"

Reply
User profile for user: Linc Davis
Linc Davis
User level: Level 10
209,547 points

Jul 15, 2013 7:15 AM in response to JJshenzhen

When you say I should make more than one back up does that mean I should buy more of these Apple Time Capsules or can I use any external harddrive of appropriate size ?


Any external drive. You don't need more than one Time Capsule.


Uninstall ESET by following these instructions. If you have a different version of the product, the procedure may be different. Back up all data before making any changes.

Reply
User profile for user: Linc Davis
Linc Davis
User level: Level 10
209,547 points

Jul 20, 2013 7:32 AM in response to JJshenzhen

1. This comment applies to malicious software ("malware") that's installed unwittingly by the victim of a network attack. It does not apply to software, such as keystroke loggers, that may be installed deliberately by an intruder who has hands-on access to the victim's computer. That threat is in a different category, and there's no easy way to defend against it. If you have reason to suspect that you're the target of such an attack, you need expert help.

If you find this comment too long or too technical, read only sections 5, 6, and 10.

OS X now implements three layers of built-in protection specifically against malware, not counting runtime protections such as execute disable, sandboxing, system library randomization, and address space layout randomization that may also guard against other kinds of exploits.

2. All versions of OS X since 10.6.7 have been able to detect known Mac malware in downloaded files, and to block insecure web plugins. This feature is transparent to the user, but internally Apple calls it "XProtect." The malware recognition database is automatically checked for updates once a day; however, you shouldn't rely on it, because the attackers are always at least a day ahead of the defenders.

The following caveats apply to XProtect:

  • It can be bypassed by some third-party networking software, such as BitTorrent clients and Java applets.
  • It only applies to software downloaded from the network. Software installed from a CD or other media is not checked.
3. Starting with OS X 10.7.5, there has been a second layer of built-in malware protection, designated " Gatekeeper" by Apple. By default, applications and Installer packages downloaded from the network will only run if they're digitally signed by a developer with a certificate issued by Apple. Software certified in this way hasn't necessarily been tested by Apple, but you can be reasonably sure that it hasn't been modified by anyone other than the developer. His identity is known to Apple, so he could be held legally responsible if he distributed malware. That may not mean much if the developer lives in a country with a weak legal system (see below.)

Gatekeeper doesn't depend on a database of known malware. It has, however, the same limitations as XProtect, and in addition the following:

  • It can easily be disabled or overridden by the user.
  • A malware attacker could get control of a code-signing certificate under false pretenses, or could simply ignore the consequences of distributing codesigned malware.
  • An App Store developer could find a way to bypass Apple's oversight, or the oversight could fail due to human error.

For the reasons given above, App Store products, and other applications recognized by Gatekeeper as signed, are safer than others, but they can't be considered absolutely safe. "Sandboxed" applications may prompt for access to private data, such as your contacts, or for access to the network. Think before granting that access. OS X security is based on user input. Never click through any request for authorization without thinking.

4. Starting with OS X 10.8.3, a third layer of protection has been added: a "Malware Removal Tool" (MRT). MRT runs automatically in the background when you update the OS. It checks for, and removes, malware that may have evaded the other protections via a Java exploit (see below.) MRT also runs when you install or update the Apple-supplied Java runtime (but not the Oracle runtime.) Like XProtect, MRT is presumably effective against known attacks, but maybe not against unknown attacks. It notifies you if it finds malware, but otherwise there's no user interface to MRT.


5. XProtect, Gatekeeper, and MRT reduce the risk of malware attack, but they're not absolute protection. The first and best line of defense is always your own intelligence. With the possible exception of Java exploits, all known malware circulating on the Internet that affects a fully-updated installation of OS X 10.6 or later takes the form of so-called "trojan horses," which can only have an effect if the victim is duped into running them. The threat therefore amounts to a battle of wits between you and the malware attacker. If you're smarter than he thinks you are, you'll win.

That means, in practice, that you never use software that comes from an untrustworthy source, or that does something inherently untrustworthy. How do you know what is trustworthy?

  • Any website that prompts you to install a “codec,” “plug-in,” "player," "extractor," or “certificate” that comes from that same site, or an unknown one, is untrustworthy.
  • A web operator who tells you that you have a “virus,” or that anything else is wrong with your computer, or that you have won a prize in a contest you never entered, is trying to commit a crime with you as the victim. (Some reputable websites did legitimately warn visitors who were infected with the "DNSChanger" malware. That exception to this rule no longer applies.)
  • Pirated copies or "cracks" of commercial software, no matter where they come from, are unsafe.
  • Software of any kind downloaded from a BitTorrent or from a Usenet binary newsgroup is unsafe.
  • Software that purports to help you do something that's illegal or that infringes copyright, such as saving streamed audio or video for reuse without permission, is unsafe. All YouTube "downloaders" are in this category, though not all are necessarily harmful.
  • Software with a corporate brand, such as Adobe Flash Player, must be downloaded directly from the developer’s website. If it comes from any other source, it's unsafe.
  • Even signed applications, no matter what the source, should not be trusted if they do something unexpected, such as asking for permission to access your contacts, your location, or the Internet for no obvious reason.
6. Java on the Web ( not to be confused with JavaScript, to which it's not related, despite the similarity of the names) is a weak point in the security of any system. Java is, among other things, a platform for running complex applications in a web page, on the client. That was always a bad idea, and Java's developers have proven themselves incapable of implementing it without also creating a portal for malware to enter. Past Java exploits are the closest thing there has ever been to a Windows-style virus affecting OS X. Merely loading a page with malicious Java content could be harmful.

Fortunately, client-side Java on the Web is obsolete and mostly extinct. Only a few outmoded sites still use it. Try to hasten the process of extinction by avoiding those sites, if you have a choice. Forget about playing games or other non-essential uses of Java.

Java is not included in OS X 10.7 and later. Discrete Java installers are distributed by Apple and by Oracle (the developer of Java.) Don't use either one unless you need it. Most people don't. If Java is installed, disable it — not JavaScript — in your browsers.

Regardless of version, experience has shown that Java on the Web can't be trusted. If you must use a Java applet for a task on a specific site, enable Java only for that site in Safari. Never enable Java for a public website that carries third-party advertising. Use it only on well-known, login-protected, secure websites without ads. In Safari 6 or later, you'll see a lock icon in the address bar with the abbreviation "https" when visiting a secure site.
Follow the above guidelines, and you’ll be as safe from malware as you can practically be. The rest of this comment concerns what you should not do to protect yourself from malware.
7. Never install any commercial "anti-virus" or "Internet security" products for the Mac, as they all do more harm than good, if they do any good at all. Any database of known threats is always going to be out of date. Most of the danger is from unknown threats. If you need to be able to detect Windows malware in your files, use the free software ClamXav— nothing else.

Why shouldn't you use commercial "anti-virus" products?
  • Their design is predicated on the nonexistent threat that malware may be injected at any time, anywhere in the file system. Malware is downloaded from the network; it doesn't materialize from nowhere.
  • In order to meet that nonexistent threat, the software modifies or duplicates low-level functions of the operating system, which is a waste of resources and a common cause of instability, bugs, and poor performance.
  • By modifying the operating system, the software itself may create weaknesses that could be exploited by malware attackers.

8. ClamXav doesn't have these drawbacks. That doesn't mean it's entirely safe. It may report email messages that have "phishing" links in the body, or Windows malware in attachments, as infected files, and offer to delete or move them. Doing so will corrupt the Mail database. The messages should be deleted from within the Mail application.

ClamXav is not needed, and should not be relied upon, for protection against OS X malware. It's useful only for detecting Windows malware. Windows malware can't harm you directly (unless, of course, you use Windows.) Just don't pass it on to anyone else.

A Windows malware attachment in email is usually easy to recognize. The file name will often be targeted at people who aren't very bright; for example:

♥♥♥♥♥♥♥♥♥♥♥♥♥♥!!!!!!!H0TBABEZ4U!!!!!!!.AVI♥♥♥♥♥♥♥♥♥♥♥♥♥♥.exe

ClamXav may be able to tell you which particular virus or trojan it is, but do you care? In practice, there's seldom a reason to use ClamXav unless a network administrator requires you to run an anti-virus application.

9. It seems to be a common belief that the built-in Application Firewall acts as a barrier to infection, or prevents malware from functioning. It does neither. It blocks inbound connections to certain network services you're running, such as file sharing. It's disabled by default and you should leave it that way if you're behind a router on a private home or office network. Activate it only when you're on an untrusted network, for instance a public Wi-Fi hotspot, where you don't want to provide services. Disable any services you don't use in the Sharing preference pane. All are disabled by default.

10. As a Mac user you don't have to live in fear that your computer is going to be infected every time you install an application, read email, or visit a web page. But neither should you have the false idea that you will always be safe, no matter what you do. The greatest harm done by security software is precisely its selling point: it makes people feel safe. They may then feel safe enough to take risks from which the software doesn't protect them. Nothing can lessen the need for safe computing practices.
Reply

Time Machine/Capsule causes system to hang

Welcome to Apple Support Community
A forum where Apple customers help each other with their products. Get started with your Apple ID.
Learn more Sign up