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My iMac running OSX 10.8.2 suddenly turned itself off. It was a hard reset. It said that an error had occurred. Basically the equivalent of a Windows 'blue screen.' It happened when I turned off my Bluetooth headset.

It booted back up. Everything appears normal. What went wrong? What action can I take to prevent this from happening again? Fortunately I had saved my work. Here's the error information:


Interval Since Last Panic Report: 3024920 sec Panics Since Last Report: 1 Anonymous UUID: CDD7F4FD-E1AC-1148-BD8E-281423DBA8B2

Wed Jan 16 16:21:58 2013 panic(cpu 2 caller 0xffffff8009c43d5b): "a freed zone element has been modified in zone: kalloc.1024"@/SourceCache/xnu/xnu-2050.18.24/osfmk/kern/zalloc.c:214 Backtrace (CPU 2), Frame : Return Address 0xffffff81dc84b3b0 : 0xffffff8009c1d626 0xffffff81dc84b420 : 0xffffff8009c43d5b 0xffffff81dc84b460 : 0xffffff8009c435d2 0xffffff81dc84b540 : 0xffffff8009c245ed 0xffffff81dc84b570 : 0xffffff800a022ca2 0xffffff81dc84b590 : 0xffffff7f8a9fe3ac 0xffffff81dc84b6d0 : 0xffffff7f8a8d71bd 0xffffff81dc84b800 : 0xffffff7f8a8ca9aa 0xffffff81dc84ba00 : 0xffffff7f8a8d0a58 0xffffff81dc84bae0 : 0xffffff7f8a8f1fb3 0xffffff81dc84bb50 : 0xffffff7f8a8f1f2f 0xffffff81dc84bbc0 : 0xffffff800a047d9a 0xffffff81dc84bc20 : 0xffffff800a064b8f 0xffffff81dc84bd70 : 0xffffff8009c981e1 0xffffff81dc84be80 : 0xffffff8009c20aed 0xffffff81dc84beb0 : 0xffffff8009c10448 0xffffff81dc84bf00 : 0xffffff8009c1961b 0xffffff81dc84bf70 : 0xffffff8009ca5b16 0xffffff81dc84bfb0 : 0xffffff8009cced53 Kernel Extensions in backtrace: com.apple.iokit.IOBluetoothFamily(4.0.9f33)[1C326A11-ADF7-353E-AD41-458D6A886E05]@0xffffff7f8a8bc000->0xffffff7f8a95cfff dependency: com.apple.iokit.IOUSBFamily(5.4.0)[C3094550-7F58-3933-A4F7-CD33AE83F8B9]@0xffffff7f8a415000 com.apple.iokit.AppleBluetoothHCIControllerUSBTransport(4.0.9f33)[867D6939-4D49-3149-A1A5-380C236C8D12]@0xffffff7f8a9f2000->0xffffff7f8aa18fff dependency: com.apple.iokit.IOUSBFamily(5.4.0)[C3094550-7F58-3933-A4F7-CD33AE83F8B9]@0xffffff7f8a415000 dependency: com.apple.iokit.IOACPIFamily(1.4)[A35915E8-C1B0-3C0F-81DF-5515BC9002FC]@0xffffff7f8a71e000 dependency: com.apple.iokit.IOPCIFamily(2.7.2)[B1B77B26-7984-302F-BA8E-544DD3D75E73]@0xffffff7f8a28d000

BSD process name corresponding to current thread: BluetoothAudioAg

Mac OS version: 12C60

Kernel version: Darwin Kernel Version 12.2.0: Sat Aug 25 00:48:52 PDT 2012; root:xnu-2050.18.24~1/RELEASE_X86_64 Kernel UUID: 69A5853F-375A-3EF4-9247-478FD0247333 Kernel slide: 0x0000000009a00000 Kernel text base: 0xffffff8009c00000 System model name: iMac12,2 (Mac-942B59F58194171B)

System uptime in nanoseconds: 155608582049924 last loaded kext at 122332985218994: com.apple.driver.AppleUSBCDC 4.1.22 (addr 0xffffff7f8c001000, size 16384) last unloaded kext at 122457059381097: com.apple.driver.AppleUSBCDC 4.1.22 (addr 0xffffff7f8c001000, size 12288) loaded kexts: com.apple.filesystems.smbfs 1.8 com.apple.filesystems.afpfs 10.0 com.apple.nke.asp_tcp 7.0.0 com.apple.driver.AppleHWSensor 1.9.5d0 com.apple.driver.AppleBluetoothMultitouch 75.15 com.apple.driver.AudioAUUC 1.60 com.apple.driver.AGPM 100.12.69 com.apple.driver.IOBluetoothSCOAudioDriver 4.0.9f33 com.apple.driver.IOBluetoothA2DPAudioDriver 4.0.9f33 com.apple.filesystems.autofs 3.0 com.apple.driver.AppleMikeyHIDDriver 122 com.apple.iokit.IOUserEthernet 1.0.0d1 com.apple.driver.AppleHDA 2.3.1f2 com.apple.driver.AppleMikeyDriver 2.3.1f2 com.apple.iokit.BroadcomBluetoothHCIControllerUSBTransport 4.0.9f33 com.apple.driver.AppleIntelHD3000Graphics 8.0.0 com.apple.iokit.IOBluetoothSerialManager 4.0.9f33 com.apple.driver.AppleUSBDisplays 353 com.apple.driver.AppleSMCPDRC 1.0.0 com.apple.driver.AppleLPC 1.6.0 com.apple.Dont_Steal_Mac_OS_X 7.0.0 com.apple.driver.AppleBacklight 170.2.3 com.apple.driver.AppleSMCLMU 2.0.2d0 com.apple.driver.AppleIntelSNBGraphicsFB 8.0.0 com.apple.driver.ACPI_SMC_PlatformPlugin 1.0.0 com.apple.driver.AppleUpstreamUserClient 3.5.10 com.apple.driver.AppleMCCSControl 1.0.33 com.apple.kext.AMDFramebuffer 8.0.0 com.apple.AMDRadeonAccelerator 1.0.0 com.apple.driver.ApplePolicyControl 3.2.11 com.apple.driver.AppleIRController 320.15 com.apple.iokit.SCSITaskUserClient 3.5.1 com.apple.driver.AppleUSBCardReader 3.1.0 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 2.2.2 com.apple.driver.AppleUSBHub 5.2.5 com.apple.driver.AirPort.Atheros40 600.70.23 com.apple.iokit.AppleBCM5701Ethernet 3.2.5b3 com.apple.driver.AppleFWOHCI 4.9.6 com.apple.driver.AppleAHCIPort 2.4.1 com.apple.driver.AppleUSBEHCI 5.4.0 com.apple.driver.AppleEFINVRAM 1.6.1 com.apple.driver.AppleACPIButtons 1.6 com.apple.driver.AppleRTC 1.5 com.apple.driver.AppleHPET 1.7 com.apple.driver.AppleSMBIOS 1.9 com.apple.driver.AppleACPIEC 1.6 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 com.apple.driver.AppleIntelCPUPowerManagement 196.0.0 com.apple.security.SecureRemotePassword 1.0 com.apple.driver.IOBluetoothHIDDriver 4.0.9f33 com.apple.driver.AppleMultitouchDriver 235.28 com.apple.kext.triggers 1.0 com.apple.driver.DspFuncLib 2.3.1f2 com.apple.iokit.IOSurface 86.0.3 com.apple.iokit.AppleBluetoothHCIControllerUSBTransport 4.0.9f33 com.apple.iokit.IOSerialFamily 10.0.6 com.apple.driver.AppleSMBusPCI 1.0.10d0 com.apple.iokit.IOBluetoothFamily 4.0.9f33 com.apple.driver.AppleThunderboltEDMSink 1.1.8 com.apple.driver.AppleThunderboltEDMSource 1.1.8 com.apple.driver.AppleBacklightExpert 1.0.4 com.apple.driver.AppleUSBAudio 2.9.0f6 com.apple.iokit.IOAudioFamily 1.8.9fc10 com.apple.kext.OSvKernDSPLib 1.6 com.apple.iokit.IOFireWireIP 2.2.5 com.apple.driver.AppleSMC 3.1.4d2 com.apple.driver.IOPlatformPluginLegacy 1.0.0 com.apple.driver.IOPlatformPluginFamily 5.2.0d16 com.apple.driver.AppleSMBusController 1.0.10d0 com.apple.driver.AppleHDAController 2.3.1f2 com.apple.iokit.IOHDAFamily 2.3.1f2 com.apple.iokit.IOAcceleratorFamily 19.0.26 com.apple.kext.AMD6000Controller 8.0.0 com.apple.kext.AMDSupport 8.0.0 com.apple.driver.AppleGraphicsControl 3.2.11 com.apple.iokit.IONDRVSupport 2.3.5 com.apple.iokit.IOGraphicsFamily 2.3.5 com.apple.driver.AppleUSBHIDKeyboard 165.5 com.apple.driver.AppleHIDKeyboard 165.5 com.apple.iokit.IOSCSIMultimediaCommandsDevice 3.5.1 com.apple.iokit.IOBDStorageFamily 1.7 com.apple.iokit.IODVDStorageFamily 1.7.1 com.apple.iokit.IOCDStorageFamily 1.7.1 com.apple.driver.AppleThunderboltDPOutAdapter 1.8.5 com.apple.driver.AppleThunderboltDPInAdapter 1.8.5 com.apple.driver.AppleThunderboltDPAdapterFamily 1.8.5 com.apple.driver.AppleThunderboltPCIUpAdapter 1.2.5 com.apple.driver.AppleThunderboltPCIDownAdapter 1.2.5 com.apple.iokit.IOUSBHIDDriver 5.2.5 com.apple.iokit.IOAHCISerialATAPI 2.5.0 com.apple.iokit.IOSCSIBlockCommandsDevice 3.5.1 com.apple.iokit.IOUSBMassStorageClass 3.5.0 com.apple.iokit.IOSCSIArchitectureModelFamily 3.5.1 com.apple.driver.AppleUSBMergeNub 5.2.5 com.apple.driver.AppleUSBComposite 5.2.5 com.apple.iokit.IOUSBUserClient 5.2.5 com.apple.driver.AppleThunderboltNHI 1.6.0 com.apple.iokit.IOThunderboltFamily 2.1.1 com.apple.iokit.IO80211Family 500.15 com.apple.iokit.IOEthernetAVBController 1.0.2b1 com.apple.iokit.IONetworkingFamily 3.0 com.apple.iokit.IOFireWireFamily 4.5.5 com.apple.iokit.IOAHCIFamily 2.2.1 com.apple.iokit.IOUSBFamily 5.4.0 com.apple.driver.AppleEFIRuntime 1.6.1 com.apple.iokit.IOHIDFamily 1.8.0 com.apple.iokit.IOSMBusFamily 1.1 com.apple.security.sandbox 220 com.apple.kext.AppleMatch 1.0.0d1 com.apple.security.TMSafetyNet 7 com.apple.driver.DiskImages 344 com.apple.iokit.IOStorageFamily 1.8 com.apple.driver.AppleKeyStore 28.21 com.apple.driver.AppleACPIPlatform 1.6 com.apple.iokit.IOPCIFamily 2.7.2 com.apple.iokit.IOACPIFamily 1.4 com.apple.kec.corecrypto 1.0 Model: iMac12,2, BootROM IM121.0047.B1F, 4 processors, Intel Core i7, 3.4 GHz, 16 GB, SMC 1.72f2 Graphics: AMD Radeon HD 6970M, AMD Radeon HD 6970M, PCIe, 1024 MB Memory Module: BANK 0/DIMM0, 4 GB, DDR3, 1333 MHz, 0x80CE, 0x4D34373142353237334348302D4348392020 Memory Module: BANK 1/DIMM0, 4 GB, DDR3, 1333 MHz, 0x80CE, 0x4D34373142353237334348302D4348392020 Memory Module: BANK 0/DIMM1, 4 GB, DDR3, 1333 MHz, 0x80CE, 0x4D34373142353237334348302D4348392020 Memory Module: BANK 1/DIMM1, 4 GB, DDR3, 1333 MHz, 0x80CE, 0x4D34373142353237334348302D4348392020 AirPort: spairport_wireless_card_type_airport_extreme (0x168C, 0x9A), Atheros 9380: 4.0.70.23-P2P Bluetooth: Version 4.0.9f33 10885, 2 service, 18 devices, 1 incoming serial ports Network Service: Ethernet, Ethernet, en0 PCI Card: Apple 57761-B0, sppci_ethernet, Thunderbolt@13,0,0 PCI Card: pci11c1,5901, sppci_ieee1394openhci, Thunderbolt@14,0,0 PCI Card: pci12d8,400e, sppci_usbopenhost, Thunderbolt@12,0,0 PCI Card: pci12d8,400e, sppci_usbopenhost, Thunderbolt@12,0,1 PCI Card: pci12d8,400f, USB Enhanced Host Controller, Thunderbolt@12,0,2 Serial ATA Device: ST31000528AS, 1 TB Serial ATA Device: OPTIARC DVD RW AD-5690H USB Device: hub_device, 0x0424 (SMSC), 0x2514, 0xfa100000 / 3 USB Device: Keyboard Hub, apple_vendor_id, 0x1006, 0xfa120000 / 5 USB Device: Apple Keyboard, apple_vendor_id, 0x024f, 0xfa122000 / 7 USB Device: BRCM2046 Hub, 0x0a5c (Broadcom Corp.), 0x4500, 0xfa110000 / 4 USB Device: Bluetooth USB Host Controller, apple_vendor_id, 0x8215, 0xfa111000 / 6 USB Device: FaceTime HD Camera (Built-in), apple_vendor_id, 0x850b, 0xfa200000 / 2 USB Device: hub_device, 0x0424 (SMSC), 0x2514, 0xfd100000 / 2 USB Device: IR Receiver, apple_vendor_id, 0x8242, 0xfd120000 / 4 USB Device: Internal Memory Card Reader, apple_vendor_id, 0x8403, 0xfd110000 / 3 USB Device: hub_device, apple_vendor_id, 0x9127, 0x40100000 / 2 USB Device: FaceTime HD Camera (Display), apple_vendor_id, 0x1112, 0x40150000 / 5 USB Device: Apple Thunderbolt Display, apple_vendor_id, 0x9227, 0x40170000 / 4 USB Device: Display Audio, apple_vendor_id, 0x1107, 0x40140000 / 3

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1 Answer

up vote 1 down vote accepted

This is a Kernel panic. It's nothing you did wrong. This happens occasionally. If it keeps happening, then try a different Bluetooth headset. It is probably the headset doing something that the OS wasn't expecting. It is most likely a fluke, so don't worry about it unless it is repeatable.

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