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

Recurring kernel panic 10.7.5 iMac

I've been encountering irregular, but consistent kernel panics for the past three months. I'm submitting reports, but there don't seem to be any updates in the channel that have affected the situation. I'd like to get to the bottom of this. The machine was completely reinstalled from media one month ago, and the situation has not changed. Whether it's a software or hardware issue, there should be some indication.


I have two panic logs. Panics occurred at:


  • new_vnode vfs_subr.c:3717. "free vnode still referenced".
  • pmap_pv_remove: pmap_internal.h:813. "pv not on hash"


This looks like memory corruption. If it's a kernel software issue, I have no idea where to start. If it's a defective memory issue, is there an on-board test to diagnose this?


Any assistance would be appreciated. Thanks.

iMac, Mac OS X (10.7.5), 2.66GHz Intel Core i5, 16GB

Posted on Oct 14, 2013 6:39 AM

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

Oct 14, 2013 7:16 AM in response to JJoganic

If you have more than one user account, you must be logged in as an administrator to carry out these instructions.

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.

Select the most recent panic log under the heading System Diagnostic Reports on the left. If you don't see that heading, select


View ▹ Show Log List

from the menu bar. Post the entire contents of the panic report — the text, please, not a screenshot. In the interest of privacy, I suggest you edit out the “Anonymous UUID,” a long string of letters, numbers, and dashes in the header and body of the report, if it’s present (it may not be.) Please don't post shutdownStall, spin, or hang reports.

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

Oct 14, 2013 8:43 AM in response to Linc Davis

Mon Oct 14 06:00:48 2013

panic(cpu 0 caller 0xffffff8000301e76): "new_vnode(0xffffff8038818f80): free vnode still referenced"@/SourceCache/xnu/xnu-1699.32.7/bsd/vfs/vfs_subr.c:3717

Backtrace (CPU 0), Frame : Return Address

0xffffff81cfec3690 : 0xffffff8000220792

0xffffff81cfec3710 : 0xffffff8000301e76

0xffffff81cfec37a0 : 0xffffff80004deacc

0xffffff81cfec3890 : 0xffffff80004ff5b3

0xffffff81cfec39e0 : 0xffffff80004ffcb3

0xffffff81cfec3a40 : 0xffffff800031daf8

0xffffff81cfec3aa0 : 0xffffff8000300617

0xffffff81cfec3b00 : 0xffffff8000313feb

0xffffff81cfec3ba0 : 0xffffff800030ce20

0xffffff81cfec3c60 : 0xffffff800030d39e

0xffffff81cfec3f60 : 0xffffff80005cde98

0xffffff81cfec3fb0 : 0xffffff80002daa79


BSD process name corresponding to current thread: Google Chrome


Mac OS version:

11G63


Kernel version:

Darwin Kernel Version 11.4.2: Thu Aug 23 16:25:48 PDT 2012; root:xnu-1699.32.7~1/RELEASE_X86_64

Kernel UUID: FF3BB088-60A4-349C-92EA-CA649C698CE5

System model name: iMac11,1 (Mac-F2268DAE)


System uptime in nanoseconds: 763836247384635

last loaded kext at 159769262537951: com.apple.driver.AppleUSBCDC 4.1.22 (addr 0xffffff7f807ca000, size 16384)

last unloaded kext at 159829485121835: com.apple.driver.AppleUSBCDC 4.1.22 (addr 0xffffff7f807ca000, size 12288)

loaded kexts:

com.apple.filesystems.smbfs 1.7.2

com.apple.filesystems.autofs 3.0

com.apple.driver.AppleHWSensor 1.9.5d0

com.apple.driver.AppleMikeyHIDDriver 122

com.apple.driver.AudioAUUC 1.59

com.apple.driver.AppleUpstreamUserClient 3.5.9

com.apple.driver.AppleHDA 2.2.5a5

com.apple.kext.ATIFramebuffer 7.3.2

com.apple.driver.AppleMikeyDriver 2.2.5a5

com.apple.driver.AGPM 100.12.75

com.apple.ATIRadeonX2000 7.3.2

com.apple.iokit.IOUserEthernet 1.0.0d1

com.apple.iokit.IOBluetoothSerialManager 4.0.8f17

com.apple.Dont_Steal_Mac_OS_X 7.0.0

com.apple.driver.AudioIPCDriver 1.2.3

com.apple.driver.ApplePolicyControl 3.1.33

com.apple.driver.ACPI_SMC_PlatformPlugin 5.0.0d8

com.apple.driver.AppleLPC 1.6.0

com.apple.driver.AppleBacklight 170.2.2

com.apple.driver.AppleMCCSControl 1.0.33

com.apple.driver.BroadcomUSBBluetoothHCIController 4.0.8f17

com.apple.driver.AppleIRController 312

com.apple.driver.AppleUSBCardReader 3.0.6

com.apple.AppleFSCompression.AppleFSCompressionTypeDataless 1.0.0d1

com.apple.AppleFSCompression.AppleFSCompressionTypeZlib 1.0.0d1

com.apple.BootCache 33

com.apple.iokit.SCSITaskUserClient 3.2.1

com.apple.driver.XsanFilter 404

com.apple.iokit.IOAHCISerialATAPI 2.0.3

com.apple.driver.AppleFWOHCI 4.9.0

com.apple.iokit.IOAHCIBlockStorage 2.1.0

com.apple.driver.AirPort.Atheros40 505.67.1

com.apple.driver.AppleUSBHub 5.1.0

com.apple.iokit.AppleBCM5701Ethernet 3.2.4b8

com.apple.driver.AppleEFINVRAM 1.6.1

com.apple.driver.AppleAHCIPort 2.3.1

com.apple.driver.AppleACPIButtons 1.5

com.apple.driver.AppleUSBEHCI 5.1.0

com.apple.driver.AppleRTC 1.5

com.apple.driver.AppleHPET 1.7

com.apple.driver.AppleSMBIOS 1.9

com.apple.driver.AppleACPIEC 1.5

com.apple.driver.AppleAPIC 1.6

com.apple.driver.AppleIntelCPUPowerManagementClient 195.0.0

com.apple.nke.applicationfirewall 3.2.30

com.apple.security.quarantine 1.4

com.apple.security.TMSafetyNet 8

com.apple.driver.AppleIntelCPUPowerManagement 195.0.0

com.apple.kext.triggers 1.0

com.apple.driver.DspFuncLib 2.2.5a5

com.apple.kext.ATI4800Controller 7.3.2

com.apple.kext.ATISupport 7.3.2

com.apple.iokit.IOSurface 80.0.2

com.apple.iokit.IOFireWireIP 2.2.5

com.apple.iokit.IOSerialFamily 10.0.5

com.apple.driver.AppleHDAController 2.2.5a5

com.apple.iokit.IOHDAFamily 2.2.5a5

com.apple.iokit.IOAudioFamily 1.8.6fc18

com.apple.kext.OSvKernDSPLib 1.3

com.apple.driver.AppleGraphicsControl 3.1.33

com.apple.driver.AppleSMBusPCI 1.0.10d0

com.apple.driver.AppleSMC 3.1.3d10

com.apple.driver.IOPlatformPluginLegacy 5.0.0d8

com.apple.driver.IOPlatformPluginFamily 5.1.1d6

com.apple.driver.AppleBacklightExpert 1.0.4

com.apple.iokit.IONDRVSupport 2.3.4

com.apple.driver.AppleSMBusController 1.0.10d0

com.apple.iokit.IOGraphicsFamily 2.3.4

com.apple.driver.AppleUSBBluetoothHCIController 4.0.8f17

com.apple.iokit.IOBluetoothFamily 4.0.8f17

com.apple.iokit.IOUSBHIDDriver 5.0.0

com.apple.iokit.IOSCSIBlockCommandsDevice 3.2.1

com.apple.iokit.IOUSBMassStorageClass 3.0.3

com.apple.driver.AppleUSBMergeNub 5.1.0

com.apple.driver.AppleUSBComposite 5.0.0

com.apple.iokit.IOSCSIMultimediaCommandsDevice 3.2.1

com.apple.iokit.IOBDStorageFamily 1.7

com.apple.iokit.IODVDStorageFamily 1.7.1

com.apple.iokit.IOCDStorageFamily 1.7.1

com.apple.iokit.IOSCSIArchitectureModelFamily 3.2.1

com.apple.iokit.IOFireWireFamily 4.4.8

com.apple.iokit.IO80211Family 420.3

com.apple.iokit.IOEthernetAVBController 1.0.1b1

com.apple.iokit.IONetworkingFamily 2.1

com.apple.iokit.IOUSBUserClient 5.0.0

com.apple.iokit.IOAHCIFamily 2.0.8

com.apple.driver.AppleEFIRuntime 1.6.1

com.apple.iokit.IOHIDFamily 1.7.1

com.apple.iokit.IOUSBFamily 5.1.0

com.apple.iokit.IOSMBusFamily 1.1

com.apple.security.sandbox 177.11

com.apple.kext.AppleMatch 1.0.0d1

com.apple.driver.DiskImages 331.7

com.apple.iokit.IOStorageFamily 1.7.2

com.apple.driver.AppleKeyStore 28.18

com.apple.driver.AppleACPIPlatform 1.5

com.apple.iokit.IOPCIFamily 2.7

com.apple.iokit.IOACPIFamily 1.4

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

Oct 14, 2013 9:15 AM in response to JJoganic

That panic was not caused by third-party software. If the problem is recurrent, the possibilities are:


  1. A stale or corrupt kernel cache
  2. A damaged OS X installation
  3. A fault in a peripheral device, if any
  4. Corrupt non-volatile memory (NVRAM)
  5. An internal hardware fault (including incompatible memory)
  6. An obscure bug in OS X


You may already have ruled out some of these.

Rule out #1 by booting in safe mode and then rebooting as usual. Note: If FileVault is enabled on some models, or if a firmware password is set, or if the boot volume is a software RAID, you can’t do this. Post for further instructions.

You can rule out #2 and #3 by reinstalling the OS and testing with non-essential peripherals disconnected and aftermarket expansion cards removed, if applicable. Sometimes a clean reinstallation may solve a problem that isn't solved by reinstalling in place.


Corrupt NVRAM, which rarely causes panics, can be ruled out by resetting it.


If your model has user-replaceable memory, and you've upgraded the memory modules, reinstall the original memory and see whether there's any improvement. Be careful not to touch the gold contacts. Clean them with a mild solvent such as rubbing alcohol. Aftermarket memory must exactly match the technical specifications for your model.


The Apple Hardware Test or Apple Diagnostics, though generally unreliable, will sometimes detect a fault. A negative test can't be depended on. Run the extended version of the test.


In the category of obscure bugs, reports suggest that FileVault may trigger kernel traps under some unknown conditions. Most, though not all, of these reports seem to involve booting from an aftermarket SSD. If those conditions apply to you, try deactivating FileVault.

Connecting more than one display is another reported trigger for OS X bugs.

If your system is not fully up to date, running Software Update might get you a bug fix.


In rare cases, a malformed network packet from a defective router or other network device can cause panics. Such packets could also be sent deliberately by a skillful attacker. This possibility is something to consider if you run a public server that might be the target of such an attack.


If none of the above applies, make a "Genius" appointment at an Apple Store to have the machine tested. You may have to leave it there for several days. There isn't much point in doing this unless you can reproduce the panic, or if you can't, it happens often enough that it's likely to be repeated at the store. Otherwise you may be told that nothing is wrong.


Print the first page of the panic report and bring it with you.


Back up all data on the internal drive(s) before you hand over your computer to anyone. If privacy is a concern, erase the data partition(s) with the option to write zeros* (do this only if you know how to restore, and you have at least two independent backups.) Don’t erase the recovery partition, if present.


Keeping your confidential data secure during hardware repair


*An SSD doesn't need to be zeroed.

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

Oct 14, 2013 1:02 PM in response to Linc Davis

I'm looking at the Apple Hardware Test option. This is a late 2009 27-inch iMac. I purchased Lion and installed it directly. There is a recovery volume.


When I hold down the D key on boot, it does not enter AHT. It simply starts normally. Other keys such as Option work as expected. Is the AHT not on the recovery volume? How might I determine this or install it?

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

Oct 14, 2013 1:09 PM in response to John Galt

I have another kernel panic log which shows "ManagedClient" as the current thread, so I'm inclined to think that Chrome is not central to the issue. Here's the second panic:


Interval Since Last Panic Report: 1851585 sec

Panics Since Last Report: 1

Anonymous UUID: REDACTED



Mon Sep 23 06:49:15 2013

panic(cpu 0 caller 0xffffff80002abab3): "pmap_pv_remove(0xffffff80331a4a28,0x7fff768ef000,0xeabe, 0x800000000eabe024): pv not on hash, head: 0xffffff802241a7c0, 0x7fff768ef000"@/SourceCache/xnu/xnu-1699.32.7/osfmk/i386/pmap_internal.h:813

Backtrace (CPU 0), Frame : Return Address

0xffffff81d1743c30 : 0xffffff8000220792

0xffffff81d1743cb0 : 0xffffff80002abab3

0xffffff81d1743d50 : 0xffffff80002abeca

0xffffff81d1743d90 : 0xffffff8000273c46

0xffffff81d1743e80 : 0xffffff8000274a3a

0xffffff81d1743eb0 : 0xffffff8000237919

0xffffff81d1743ef0 : 0xffffff8000544d49

0xffffff81d1743f40 : 0xffffff800054288e

0xffffff81d1743f50 : 0xffffff80005ce4cb

0xffffff81d1743fb0 : 0xffffff80002daea3



BSD process name corresponding to current thread: ManagedClient



Mac OS version:

11G63



Kernel version:

Darwin Kernel Version 11.4.2: Thu Aug 23 16:25:48 PDT 2012; root:xnu-1699.32.7~1/RELEASE_X86_64

Kernel UUID: FF3BB088-60A4-349C-92EA-CA649C698CE5

System model name: iMac11,1 (Mac-F2268DAE)



System uptime in nanoseconds: 356591628620776

last loaded kext at 154938612792: com.apple.filesystems.smbfs 1.7.2 (addr 0xffffff7f80795000, size 241664)

last unloaded kext at 98179587831: com.apple.driver.AppleUSBUHCI 5.1.0 (addr 0xffffff7f80a9d000, size 65536)

loaded kexts:

com.apple.filesystems.smbfs 1.7.2

com.apple.filesystems.autofs 3.0

com.apple.driver.AppleHWSensor 1.9.5d0

com.apple.driver.AppleMikeyHIDDriver 122

com.apple.driver.AppleMikeyDriver 2.2.5a5

com.apple.driver.AppleUpstreamUserClient 3.5.9

com.apple.driver.AppleHDA 2.2.5a5

com.apple.driver.AudioAUUC 1.59

com.apple.driver.AGPM 100.12.75

com.apple.kext.ATIFramebuffer 7.3.2

com.apple.iokit.IOUserEthernet 1.0.0d1

com.apple.iokit.IOBluetoothSerialManager 4.0.8f17

com.apple.ATIRadeonX2000 7.3.2

com.apple.Dont_Steal_Mac_OS_X 7.0.0

com.apple.driver.AudioIPCDriver 1.2.3

com.apple.driver.ApplePolicyControl 3.1.33

com.apple.driver.AppleLPC 1.6.0

com.apple.driver.ACPI_SMC_PlatformPlugin 5.0.0d8

com.apple.driver.AppleBacklight 170.2.2

com.apple.driver.AppleMCCSControl 1.0.33

com.apple.driver.BroadcomUSBBluetoothHCIController 4.0.8f17

com.apple.driver.AppleIRController 312

com.apple.driver.AppleUSBCardReader 3.0.6

com.apple.AppleFSCompression.AppleFSCompressionTypeDataless 1.0.0d1

com.apple.AppleFSCompression.AppleFSCompressionTypeZlib 1.0.0d1

com.apple.BootCache 33

com.apple.iokit.SCSITaskUserClient 3.2.1

com.apple.driver.XsanFilter 404

com.apple.iokit.IOAHCISerialATAPI 2.0.3

com.apple.iokit.IOAHCIBlockStorage 2.1.0

com.apple.driver.AppleUSBHub 5.1.0

com.apple.driver.AppleFWOHCI 4.9.0

com.apple.driver.AirPort.Atheros40 505.67.1

com.apple.iokit.AppleBCM5701Ethernet 3.2.4b8

com.apple.driver.AppleEFINVRAM 1.6.1

com.apple.driver.AppleAHCIPort 2.3.1

com.apple.driver.AppleUSBEHCI 5.1.0

com.apple.driver.AppleACPIButtons 1.5

com.apple.driver.AppleRTC 1.5

com.apple.driver.AppleHPET 1.7

com.apple.driver.AppleSMBIOS 1.9

com.apple.driver.AppleACPIEC 1.5

com.apple.driver.AppleAPIC 1.6

com.apple.driver.AppleIntelCPUPowerManagementClient 195.0.0

com.apple.nke.applicationfirewall 3.2.30

com.apple.security.quarantine 1.4

com.apple.security.TMSafetyNet 8

com.apple.driver.AppleIntelCPUPowerManagement 195.0.0

com.apple.kext.triggers 1.0

com.apple.driver.DspFuncLib 2.2.5a5

com.apple.iokit.IOSurface 80.0.2

com.apple.iokit.IOSerialFamily 10.0.5

com.apple.kext.ATI4800Controller 7.3.2

com.apple.kext.ATISupport 7.3.2

com.apple.iokit.IOAudioFamily 1.8.6fc18

com.apple.kext.OSvKernDSPLib 1.3

com.apple.driver.AppleHDAController 2.2.5a5

com.apple.iokit.IOHDAFamily 2.2.5a5

com.apple.driver.AppleGraphicsControl 3.1.33

com.apple.driver.AppleSMC 3.1.3d10

com.apple.driver.IOPlatformPluginLegacy 5.0.0d8

com.apple.driver.IOPlatformPluginFamily 5.1.1d6

com.apple.driver.AppleSMBusPCI 1.0.10d0

com.apple.driver.AppleBacklightExpert 1.0.4

com.apple.iokit.IONDRVSupport 2.3.4

com.apple.iokit.IOFireWireIP 2.2.5

com.apple.driver.AppleSMBusController 1.0.10d0

com.apple.iokit.IOGraphicsFamily 2.3.4

com.apple.driver.AppleUSBBluetoothHCIController 4.0.8f17

com.apple.iokit.IOBluetoothFamily 4.0.8f17

com.apple.iokit.IOUSBHIDDriver 5.0.0

com.apple.iokit.IOSCSIBlockCommandsDevice 3.2.1

com.apple.iokit.IOUSBMassStorageClass 3.0.3

com.apple.driver.AppleUSBMergeNub 5.1.0

com.apple.driver.AppleUSBComposite 5.0.0

com.apple.iokit.IOSCSIMultimediaCommandsDevice 3.2.1

com.apple.iokit.IOBDStorageFamily 1.7

com.apple.iokit.IODVDStorageFamily 1.7.1

com.apple.iokit.IOCDStorageFamily 1.7.1

com.apple.iokit.IOSCSIArchitectureModelFamily 3.2.1

com.apple.iokit.IOUSBUserClient 5.0.0

com.apple.iokit.IOFireWireFamily 4.4.8

com.apple.iokit.IO80211Family 420.3

com.apple.iokit.IOEthernetAVBController 1.0.1b1

com.apple.iokit.IONetworkingFamily 2.1

com.apple.iokit.IOAHCIFamily 2.0.8

com.apple.iokit.IOUSBFamily 5.1.0

com.apple.driver.AppleEFIRuntime 1.6.1

com.apple.iokit.IOHIDFamily 1.7.1

com.apple.iokit.IOSMBusFamily 1.1

com.apple.security.sandbox 177.11

com.apple.kext.AppleMatch 1.0.0d1

com.apple.driver.DiskImages 331.7

com.apple.iokit.IOStorageFamily 1.7.2

com.apple.driver.AppleKeyStore 28.18

com.apple.driver.AppleACPIPlatform 1.5

com.apple.iokit.IOPCIFamily 2.7

com.apple.iokit.IOACPIFamily 1.4

System Profile:

Model: iMac11,1, BootROM IM111.0034.B02, 4 processors, Intel Core i5, 2.66 GHz, 16 GB, SMC 1.54f36

Graphics: ATI Radeon HD 4850, ATI Radeon HD 4850, PCIe, 512 MB

Memory Module: BANK 0/DIMM0, 4 GB, DDR3, 1067 MHz, 0x0000, 0x000000000000000000000000000000000000

Memory Module: BANK 1/DIMM0, 4 GB, DDR3, 1067 MHz, 0x0000, 0x000000000000000000000000000000000000

Memory Module: BANK 0/DIMM1, 4 GB, DDR3, 1067 MHz, 0x0000, 0x000000000000000000000000000000000000

Memory Module: BANK 1/DIMM1, 4 GB, DDR3, 1067 MHz, 0x0000, 0x000000000000000000000000000000000000

AirPort: spairport_wireless_card_type_airport_extreme (0x168C, 0x8F), Atheros 9280: 4.0.67.5-P2P

Bluetooth: Version 4.0.8f17, 2 service, 18 devices, 1 incoming serial ports

Network Service: Ethernet, Ethernet, en0

Network Service: Wi-Fi, AirPort, en1

Serial ATA Device: ST31000528AS, 1 TB

Serial ATA Device: HL-DT-ST DVDRW GA11N

USB Device: hub_device, 0x0424 (SMSC), 0x2514, 0xfa100000 / 2

USB Device: USB2.0 Hub, 0x05e3 (Genesys Logic, Inc.), 0x0608, 0xfa130000 / 5

USB Device: USB Optical Mouse, 0x046d (Logitech Inc.), 0xc05a, 0xfa133000 / 9

USB Device: hub_device, 0x0409 (NEC Corporation), 0x005a, 0xfa132000 / 8

USB Device: Das Keyboard Model S, 0x24f0, 0x0137, 0xfa131000 / 6

USB Device: Internal Memory Card Reader, apple_vendor_id, 0x8403, 0xfa120000 / 4

USB Device: BRCM2046 Hub, 0x0a5c (Broadcom Corp.), 0x4500, 0xfa110000 / 3

USB Device: Bluetooth USB Host Controller, apple_vendor_id, 0x8215, 0xfa111000 / 7

USB Device: hub_device, 0x0424 (SMSC), 0x2514, 0xfd100000 / 2

USB Device: Back-UPS RS 1500 LCD FW:839.H7 .D USB FW:H7, 0x051d (American Power Conversion), 0x0002, 0xfd140000 / 5

USB Device: Built-in iSight, apple_vendor_id, 0x8502, 0xfd110000 / 4

USB Device: IR Receiver, apple_vendor_id, 0x8242, 0xfd120000 / 3

Reply
User profile for user: John Galt
John Galt
User level: Level 10
141,150 points

Oct 14, 2013 1:37 PM in response to JJoganic

Memory Module: BANK 0/DIMM0, 4 GB, DDR3, 1067 MHz, 0x0000, 0x000000000000000000000000000000000000


This is unusual and is likely to indicate a memory failure, logic board failure, or both.


RunApple Hardware Test.


If the Mac shipped with discs, insert the disc bearing the label "AHT Version" or "Apple Hardware Test" and hold the d key while it starts. Run the extended tests, though a failure is the only result that should be considered conclusive from using AHT to diagnose memory problems.


You must remove the firmware password, if one has been set, before you can use AHT.


Rember, a free GUI front end for memtest and may be useful to diagnose suspected memory failures that pass AHT's tests. However, it can only test memory that had not already been allocated to other processes.

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

Oct 14, 2013 2:03 PM in response to John Galt

If this mac shipped with disks, I'm not aware of them, and the "D" key does not appear to have any effect on boot.


The rescue partition contains Lion-specific code, so if the AHT was on the disk previously, then presumably it has been overwritten. Should the Lion USB stick contain a copy of AHT, or is it model-specific? Can a replacement be obtained?


I am running Rember now, recognizing that it can only operate on memory as it is made available by the kernel.


John Galt wrote:


Memory Module: BANK 0/DIMM0, 4 GB, DDR3, 1067 MHz, 0x0000, 0x000000000000000000000000000000000000




Is there something specific about this that indicates a problem? What would the expected output be?

Reply
User profile for user: John Galt
John Galt
User level: Level 10
141,150 points

Oct 14, 2013 6:05 PM in response to JJoganic

JJoganic wrote:


Is there something specific about this that indicates a problem? What would the expected output be?


It's merely unusual. The memory might be perfectly OK. If the Mac's originally installed memory was removed for an upgrade, replace the original RAM (if you still have it) and determine if the kernel panics subside.


Your iMac would have shipped with discs since it predated Lion. You can obtain a replacement set from Apple. They will require your Mac's serial number.


You should have those discs for a number of reasons, but I wouldn't concern yourself with AHT. Unless it finds specific errors it will conclude "no trouble found", but failure for it to identify a specific fault does not mean one does not exist.

Reply
User profile for user: John Galt
John Galt
User level: Level 10
141,150 points

Oct 15, 2013 11:04 AM in response to JJoganic

If you decide to purchase memory to rule yours out as a potential problem, purchase it from a vendor known to supply RAM that meets Apple's stringent specifications. The only two vendors with which I have personal experience and can recommend are Crucial and OWC / MacSales. Complaints regarding memory sold by other vendors are common on this site.


Replacing it would be easier to justify if AHT or similar test utility reported a failure, so unless it has, replacing it amounts to guesswork. From the information you have, and lacking the time-consuming and exhaustive hardware diagnostics available only from Apple or AASP, there is nothing else to recommend.

Reply

Recurring kernel panic 10.7.5 iMac

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