10 Replies Latest reply: Aug 24, 2013 9:30 AM by John Galt
Gustavobarra Level 1 Level 1

Hui guys. I'm new to Mac. My new iMac is rebooting many times a day.With the help from Apple, I've cheked hardware, ram. Everything seems do to be ok. Any ideas ?

Thanks a lot for any help.

iMac (21.5-inch, Late 2012), OS X Mountain Lion (10.8.4), Running Parallels, Windows 7 64.
Solved by John Galt on Aug 24, 2013 9:30 AM Solved

Backups created prior to uninstalling Avast should not be relied upon, so I suggest you create an entirely new backup.


Time Capsule is fine. It is no more or less reliable than anything else.


Augmenting your backup strategy with the use of additional devices as you suggest is always a good idea though. Using additional methods such as a "clone" is also a good idea. Such redundancy ensures the risk of permanent data loss is reduced to an acceptable degree.

  • iheartapple1970 Level 3 Level 3

    sounds like a kernel panic, the following article tells how to troubleshoot this:




    this should resolve the issue or at least isolate the cause

  • John Galt Level 8 Level 8

    You should be contacting AppleCare for concerns regarding a new Mac.


    After it restarted, did you see a dialog box resembling this one:


    Your computer restarted because of a problem.png


    If so, next time it occurs click Report...


    Before you send it to Apple, copy the text of the report. Paste it in a reply.


    Remove or obscure any personal information, should it appear.

  • Gustavobarra Level 1 Level 1

    Interval Since Last Panic Report:  11966 sec

    Panics Since Last Report:          2

    Anonymous UUID:                    D7068D13-7E47-76F9-2CB7-A104663FA428



    Wed Aug 21 16:40:53 2013

    panic(cpu 1 caller 0xffffff80080f8163): "hfs_vnop_link: error 2 updating vp @ 0xffffff8023c230f8\n"@/SourceCache/xnu/xnu-2050.24.15/bsd/hfs/hfs_link.c:643

    Backtrace (CPU 1), Frame : Return Address

    0xffffff80f8223a00 : 0xffffff8007e1d626

    0xffffff80f8223a70 : 0xffffff80080f8163

    0xffffff80f8223b80 : 0xffffff8007f121d6

    0xffffff80f8223be0 : 0xffffff8007efcb88

    0xffffff80f8223f50 : 0xffffff80081e16aa

    0xffffff80f8223fb0 : 0xffffff8007ece9c3



    BSD process name corresponding to current thread: backupd



    Mac OS version:




    Kernel version:

    Darwin Kernel Version 12.4.0: Wed May  1 17:57:12 PDT 2013; root:xnu-2050.24.15~1/RELEASE_X86_64

    Kernel UUID: 896CB1E3-AB79-3DF1-B595-549DFFDF3D36

    Kernel slide:     0x0000000007c00000

    Kernel text base: 0xffffff8007e00000

    System model name: iMac13,1 (Mac-00BE6ED71E35EB86)



    System uptime in nanoseconds: 2619450806347

    last loaded kext at 2245277373056: com.apple.filesystems.afpfs          10.0 (addr 0xffffff7f8a1c7000, size 348160)

    last unloaded kext at 323073103927: com.apple.filesystems.msdosfs          1.8.1 (addr 0xffffff7f8a19b000, size 57344)

    loaded kexts:

    com.avast.PacketForwarder          1.3

    com.avast.AvastFileShield          2.0.0

    com.apple.filesystems.afpfs          10.0

    com.apple.nke.asp_tcp          7.1.0

    com.apple.driver.AppleBluetoothMultitouch          75.19

    com.apple.driver.AudioAUUC          1.60

    com.apple.driver.AppleHWSensor          1.9.5d0

    com.apple.iokit.IOBluetoothSerialManager          4.1.4f2

    com.apple.driver.AGPM          100.12.87

    com.apple.driver.ApplePlatformEnabler          2.0.6d1

    com.apple.driver.X86PlatformShim          1.0.0

    com.apple.filesystems.autofs          3.0

    com.apple.driver.AppleMikeyHIDDriver          122

    com.apple.driver.AppleHDA          2.3.7fc4

    com.apple.iokit.IOUserEthernet          1.0.0d1

    com.apple.driver.AppleMikeyDriver          2.3.7fc4

    com.apple.iokit.BroadcomBluetoothHCIControllerUSBTransport          4.1.4f2

    com.apple.driver.AppleUpstreamUserClient          3.5.10

    com.apple.driver.AppleLPC          1.6.0

    com.apple.Dont_Steal_Mac_OS_X          7.0.0

    com.apple.driver.AppleSMCLMU          2.0.3d0

    com.apple.driver.ApplePolicyControl          3.4.5

    com.apple.driver.AppleIntelHD4000Graphics          8.1.2

    com.apple.GeForce          8.1.2

    com.apple.driver.AppleIntelFramebufferCapri          8.1.2

    com.apple.driver.AppleMCCSControl          1.1.11

    com.apple.iokit.SCSITaskUserClient          3.5.5

    com.apple.driver.AppleUSBODD          3.1.7

    com.apple.AppleFSCompression.AppleFSCompressionTypeDataless          1.0.0d1

    com.apple.AppleFSCompression.AppleFSCompressionTypeZlib          1.0.0d1

    com.apple.BootCache          34

    com.apple.driver.XsanFilter          404

    com.apple.iokit.IOAHCIBlockStorage          2.3.1

    com.apple.driver.AppleUSBHub          5.5.5

    com.apple.iokit.AppleBCM5701Ethernet          3.6.1b4

    com.apple.driver.AirPort.Brcm4331          615.20.17

    com.apple.driver.AppleSDXC          1.4.2

    com.apple.driver.AppleAHCIPort          2.5.2

    com.apple.driver.AppleUSBXHCI          5.6.0

    com.apple.driver.AppleUSBEHCI          5.5.0

    com.apple.driver.AppleEFINVRAM          1.7

    com.apple.driver.AppleRTC          1.5

    com.apple.driver.AppleACPIButtons          1.7

    com.apple.driver.AppleHPET          1.8

    com.apple.driver.AppleSMBIOS          1.9

    com.apple.driver.AppleACPIEC          1.7

    com.apple.driver.AppleAPIC          1.6

    com.apple.driver.AppleIntelCPUPowerManagementClient          196.0.0

    com.apple.nke.applicationfirewall          4.0.39

    com.apple.security.quarantine          2.1

    com.apple.driver.AppleIntelCPUPowerManagement          196.0.0

    com.apple.security.SecureRemotePassword          1.0

    com.apple.driver.AppleBluetoothHIDKeyboard          170.2

    com.apple.driver.AppleHIDKeyboard          170.2

    com.apple.driver.IOBluetoothHIDDriver          4.1.4f2

    com.apple.driver.AppleMultitouchDriver          235.29

    com.apple.iokit.IOSerialFamily          10.0.6

    com.apple.kext.triggers          1.0

    com.apple.driver.DspFuncLib          2.3.7fc4

    com.apple.iokit.IOAudioFamily          1.8.9fc11

    com.apple.kext.OSvKernDSPLib          1.6

    com.apple.iokit.IOSurface          86.0.4

    com.apple.iokit.IOBluetoothFamily          4.1.4f2

    com.apple.iokit.AppleBluetoothHCIControllerUSBTransport          4.1.4f2

    com.apple.driver.X86PlatformPlugin          1.0.0

    com.apple.driver.IOPlatformPluginFamily          5.3.0d51

    com.apple.driver.AppleThunderboltEDMSink          1.1.8

    com.apple.driver.AppleThunderboltEDMSource          1.1.8

    com.apple.driver.AppleSMBusPCI          1.0.11d0

    com.apple.driver.AppleSMC          3.1.4d2

    com.apple.driver.AppleHDAController          2.3.7fc4

    com.apple.iokit.IOHDAFamily          2.3.7fc4

    com.apple.iokit.IOAcceleratorFamily          74.5.1

    com.apple.driver.AppleGraphicsControl          3.4.5

    com.apple.nvidia.gk100hal          8.1.2

    com.apple.NVDAResman          8.1.2

    com.apple.driver.AppleSMBusController          1.0.11d0

    com.apple.iokit.IONDRVSupport          2.3.7

    com.apple.iokit.IOGraphicsFamily          2.3.7

    com.apple.iokit.IOSCSIMultimediaCommandsDevice          3.5.5

    com.apple.iokit.IOBDStorageFamily          1.7

    com.apple.iokit.IODVDStorageFamily          1.7.1

    com.apple.iokit.IOCDStorageFamily          1.7.1

    com.apple.driver.AppleThunderboltDPOutAdapter          1.8.9

    com.apple.driver.AppleThunderboltDPInAdapter          1.8.9

    com.apple.driver.AppleThunderboltDPAdapterFamily          1.8.9

    com.apple.driver.AppleThunderboltPCIDownAdapter          1.2.6

    com.apple.iokit.IOUSBMassStorageClass          3.5.1

    com.apple.iokit.IOSCSIArchitectureModelFamily          3.5.5

    com.apple.driver.AppleUSBMergeNub          5.5.5

    com.apple.driver.AppleUSBComposite          5.2.5

    com.apple.iokit.IOUSBUserClient          5.5.5

    com.apple.driver.AppleThunderboltNHI          1.7.8

    com.apple.iokit.IOThunderboltFamily          2.4.0

    com.apple.iokit.IOEthernetAVBController          1.0.2b1

    com.apple.iokit.IO80211Family          530.4

    com.apple.iokit.IONetworkingFamily          3.0

    com.apple.iokit.IOAHCIFamily          2.3.1

    com.apple.iokit.IOUSBFamily          5.6.0

    com.apple.driver.AppleEFIRuntime          1.7

    com.apple.iokit.IOHIDFamily          1.8.1

    com.apple.iokit.IOSMBusFamily          1.1

    com.apple.security.sandbox          220.3

    com.apple.kext.AppleMatch          1.0.0d1

    com.apple.security.TMSafetyNet          7

    com.apple.driver.DiskImages          345

    com.apple.iokit.IOStorageFamily          1.8

    com.apple.driver.AppleKeyStore          28.21

    com.apple.driver.AppleACPIPlatform          1.7

    com.apple.iokit.IOPCIFamily          2.7.3

    com.apple.iokit.IOACPIFamily          1.4

    com.apple.kec.corecrypto          1.0

    Model: iMac13,1, BootROM IM131.010A.B05, 4 processors, Intel Core i5, 2.7 GHz, 8 GB, SMC 2.9f5

    Graphics: NVIDIA GeForce GT 640M, NVIDIA GeForce GT 640M, PCIe, 512 MB

    Memory Module: BANK 0/DIMM0, 4 GB, DDR3, 1600 MHz, 0x80AD, 0x484D54333531533643465238432D50422020

    Memory Module: BANK 1/DIMM0, 4 GB, DDR3, 1600 MHz, 0x80AD, 0x484D54333531533643465238432D50422020

    AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0xF4), Broadcom BCM43xx 1.0 (

    Bluetooth: Version 4.1.4f2 12041, 2 service, 18 devices, 1 incoming serial ports

    Network Service: Ethernet, Ethernet, en0

    Serial ATA Device: APPLE HDD ST1000LM024, 1 TB

    USB Device: hub_device, 0x8087  (Intel Corporation), 0x0024, 0x1a100000 / 2

    USB Device: USB 2.0 Hub [MTT], 0x1a40  (TERMINUS TECHNOLOGY INC.), 0x0201, 0x1a120000 / 5

    USB Device: HP LaserJet Professional P 1102w, 0x03f0  (Hewlett Packard), 0x102a, 0x1a130000 / 4

    USB Device: FaceTime HD Camera (Built-in), apple_vendor_id, 0x8511, 0x1a110000 / 3

    USB Device: hub_device, 0x8087  (Intel Corporation), 0x0024, 0x1d100000 / 2

    USB Device: MacBook Air SuperDrive, apple_vendor_id, 0x1500, 0x1d130000 / 8

    USB Device: hub_device, 0x0424  (SMSC), 0x2412, 0x1d180000 / 3

    USB Device: BRCM20702 Hub, 0x0a5c  (Broadcom Corp.), 0x4500, 0x1d181000 / 4

    USB Device: Bluetooth USB Host Controller, apple_vendor_id, 0x828b, 0x1d181300 / 5


    I've installed (and updated): Office for Mac 2011; Parallels Desktop 8; Windows 7 Home Premium 64; Paragon; Office 2007 (for Windows); Avast Anti virus; Wallpapers HD.

  • Gustavobarra Level 1 Level 1

    I also have the following hardware:  Time Capsule 2TB (as a router and working with Time Machine); HP Laser Printer model P1102W; Super Drive (from Apple); a HUB USB 8 ports (C3 Tech); an ethernet cable running from my Time Capsule to the iMac. I also have recently purchased the new MacBook Air with exactly the same softwares installed on it (Parallels, Windows 7 Home Premium, Paragon and Avast). Until now it showed no frozen or kernell problems.

    Thanks for all of you guys who can give some help.


  • Linc Davis Level 10 Level 10

    Although it's probably not contributing to this problem, you should remove the worthless "Avast" product according to the developer's instructions. As long as it's installed, your system is unmaintainable.


    The Time Machine backup data on the network device is corrupt. The first thing you should do, if that's your only backup, is to make another complete backup to a locally attached storage device. One backup is never enough to be safe. Network backups are less reliable than local ones.


    After that, hold down the option key and select Verify Backups from the Time Machine menu in the menu bar (not the Dock icon.) This operation may take a long time. If the menu-bar icon (a clock that runs backwards) isn't showing, check Show Time Machine in menu bar in the preferences.


    If you continue to get panics, erase the backup device. With an AirPort device, you do that from within the AirPort Utility application; see its built-in help for details. All backups will be lost, so don't do this until you've backed up to another device. After erasing, select the device again as a backup destination in the Time Machine preference pane. The first backup should be made over a wired connection, if possible.


    If you still have problems after erasing the device, it should be replaced.

  • John Galt Level 8 Level 8

    Avast may be the reason your file system became corrupted. For that reason, I suggest you do not rely upon any Time Machine backups created prior to uninstalling it.


    I would not rely upon anything to remain intact subsequent to using Avast or any similar ill-conceived product that modifies the Mac's file system. In an abundance of caution you should consider erasing your existing system and rebuilding it.

  • Gustavobarra Level 1 Level 1

    Thank you very much for your help. Yes, I've just uninstalled Avast e the problem seems to be solved. Well, must wait for some more days to see. Don't you recommend any antivirus to protect my iMac ?

    Macs don't need any antivirus at all ? I also made a full delete of the hard disk inside my Time Capsule (brand new, too). Updated my Parallels Desktop 8, Windows 7 Home Premium 64, Paragon, Office for Mac 2011, as I remeber.


  • John Galt Level 8 Level 8

    Gustavobarra wrote:


    ... Macs don't need any antivirus at all ?


    Everything you need is already included in OS X. You already paid for it. Just keep it up to date.


    Third party "anti-virus" solutions convey no additional benefit. Most will only cause problems of varying degrees, costing you varying amounts of time and money to correct whether they are "free" or not. Avast is one of the worst examples.

  • Gustavobarra Level 1 Level 1

    Please, after doing a full delete of the internal hard disk of the Time Capsule, do you also recommend me to insist on it to make a new backup, or it is more reliable to buy one external USB (or even Thunderbolt) drive for the future backups ? If so, which brand do you recommend ?

    The last 3 days my new iMac is running rock solid, with no kernell panics.

    Thanks a lot for your help !!!!!!!

  • John Galt Level 8 Level 8

    Backups created prior to uninstalling Avast should not be relied upon, so I suggest you create an entirely new backup.


    Time Capsule is fine. It is no more or less reliable than anything else.


    Augmenting your backup strategy with the use of additional devices as you suggest is always a good idea though. Using additional methods such as a "clone" is also a good idea. Such redundancy ensures the risk of permanent data loss is reduced to an acceptable degree.