Q: iMac Keeps Restarting Itself. Help!

I'm hoping that someone can help with an issue I've been having with my iMac for a while now.

The iMac in question is a 24", 3.06 GHz Intel Core 2 Duo from late 2008 (If I remember rightly). The original HDD failed and so I replaced the drive myself. The replacement drive also turned out to be faulty. A few months ago (maybe 6) I replaced the HDD again and it has worked perfectly.

Recently, however, it has started to reboot itself quite frequently. It seems to happen when left alone for a while. More recently it has begun doing it when coming out of sleep mode. Today I have just noticed that it restarts itself when I insert or remove a Firewire external disk.

What I can do about this? Does any know what the problem might be?

Any help would be much appreciated. Thanks.

This is the message I get on the report:

Anonymous UUID:       6F5D4AA4-592C-88AB-F6D3-E0DCA8798349

Sat Jan 11 17:43:27 2014

panic(cpu 1 caller 0xffffff80060dc19e): Kernel trap at 0xffffff7f87384af7, type 13=general protection, registers:

CR0: 0x000000008001003b, CR2: 0x000000010037fe78, CR3: 0x000000000889c000, CR4: 0x0000000000000660

RAX: 0xe1b84a5cfdce00b8, RBX: 0xffffff801ee9fd48, RCX: 0xffffffffcb4d8162, RDX: 0x7fffffffffffffff

RSP: 0xffffff8084ccbfa0, RBP: 0xffffff8084ccbfb0, RSI: 0x0000000000000002, RDI: 0xdeadbeefdeadbeef

R8:  0x0000000000000163, R9:  0x0000000000000000, R10: 0xffffff8084ccbc90, R11: 0xffffff800644b980

R12: 0xffffff801122d6d0, R13: 0xffffff8014f3f8a0, R14: 0x0000000000000000, R15: 0xffffff8014f3f8a0

RFL: 0x0000000000010282, RIP: 0xffffff7f87384af7, CS:  0x0000000000000008, SS:  0x0000000000000010

Fault CR2: 0x000000010037fe78, Error code: 0x0000000000000000, Fault CPU: 0x1

Backtrace (CPU 1), Frame : Return Address

0xffffff807950ddf0 : 0xffffff8006022f69

0xffffff807950de70 : 0xffffff80060dc19e

0xffffff807950e040 : 0xffffff80060f3606

0xffffff807950e060 : 0xffffff7f87384af7

0xffffff8084ccbfb0 : 0xffffff80060d6aa7

      Kernel Extensions in backtrace:

         com.digidesign.fwfamily.driver(9.0f4)[EA9004EA-D8CD-1CA7-6281-17C82B2AF0EF]@0xf fffff7f87376000->0xffffff7f87397fff

            dependency: com.apple.iokit.IOFireWireAVC(4.2.2)[90DCC875-0911-3857-8D4E-838CA0149D3F]@0xff ffff7f86fee000

            dependency: com.apple.iokit.IOAudioFamily(1.9.4fc11)[5077FB4F-0903-3D79-8280-5B2341E93BF3]@ 0xffffff7f8693c000

            dependency: com.apple.iokit.IOFireWireFamily(4.5.5)[C83215A8-3406-35EC-8C24-A1746E9565DF]@0 xffffff7f869fb000

BSD process name corresponding to current thread: kernel_task

Mac OS version:

13B42

Kernel version:

Darwin Kernel Version 13.0.0: Thu Sep 19 22:22:27 PDT 2013; root:xnu-2422.1.72~6/RELEASE_X86_64

Kernel UUID: 1D9369E3-D0A5-31B6-8D16-BFFBBB390393

Kernel slide:     0x0000000005e00000

Kernel text base: 0xffffff8006000000

System model name: iMac8,1 (Mac-F227BEC8)

System uptime in nanoseconds: 2937855044718

last loaded kext at 1072284039122: com.apple.filesystems.smbfs          2.0.0 (addr 0xffffff7f88212000, size 335872)

last unloaded kext at 391169582647: com.apple.filesystems.msdosfs          1.9 (addr 0xffffff7f88212000, size 57344)

loaded kexts:

com.Cycling74.driver.Soundflower          1.5.1

com.digidesign.iokit.DigiDal          9.0.6f4

com.paceap.kext.pacesupport.snowleopard          5.8

com.xxxchurch.x3nke          1.0.2

com.digidesign.fwfamily.driver          9.0f4

com.orderedbytes.driver.ControllerMateFamily          4.4.3

com.orderedbytes.driver.CMUSBDevices          4.4.3

com.apple.filesystems.smbfs          2.0.0

com.apple.iokit.IOBluetoothSerialManager          4.2.0f6

com.apple.driver.AppleHWSensor          1.9.5d0

com.apple.driver.AudioAUUC          1.60

com.apple.iokit.IOUserEthernet          1.0.0d1

com.apple.Dont_Steal_Mac_OS_X          7.0.0

com.apple.filesystems.autofs          3.0

com.apple.driver.AppleHDA          2.5.3fc1

com.apple.driver.AppleSMCPDRC          1.0.0

com.apple.driver.ACPI_SMC_PlatformPlugin          1.0.0

com.apple.driver.AppleLPC          1.7.0

com.apple.iokit.BroadcomBluetoothHostControllerUSBTransport          4.2.0f6

com.apple.driver.AppleHWAccess          1

com.apple.driver.AppleBacklight          170.3.5

com.apple.driver.AppleUpstreamUserClient          3.5.13

com.apple.driver.AppleMCCSControl          1.1.12

com.apple.kext.AMDFramebuffer          1.1.4

com.apple.ATIRadeonX2000          8.1.8

com.apple.kext.AMD2600Controller          1.1.4

com.apple.driver.AppleIRController          325.7

com.apple.driver.Oxford_Semi          3.3.5

com.apple.AppleFSCompression.AppleFSCompressionTypeDataless          1.0.0d1

com.apple.AppleFSCompression.AppleFSCompressionTypeZlib          1.0.0d1

com.apple.BootCache          35

com.apple.iokit.SCSITaskUserClient          3.6.0

com.apple.driver.XsanFilter          404

com.apple.iokit.IOAHCIBlockStorage          2.4.0

com.apple.driver.AppleUSBHub          650.4.4

com.apple.iokit.AppleYukon2          3.2.3b1

com.apple.driver.AirPortBrcm43224          700.36.24

com.apple.driver.AppleFWOHCI          4.9.9

com.apple.driver.AppleAHCIPort          2.9.5

com.apple.driver.AppleIntelPIIXATA          2.5.1

com.apple.driver.AppleUSBEHCI          650.4.1

com.apple.driver.AppleUSBUHCI          650.4.0

com.apple.driver.AppleRTC          2.0

com.apple.driver.AppleHPET          1.8

com.apple.driver.AppleACPIButtons          2.0

com.apple.driver.AppleSMBIOS          2.0

com.apple.driver.AppleACPIEC          2.0

com.apple.driver.AppleAPIC          1.7

com.apple.driver.AppleIntelCPUPowerManagementClient          216.0.0

com.apple.nke.applicationfirewall          153

com.apple.security.quarantine          3

com.apple.driver.AppleIntelCPUPowerManagement          216.0.0

com.apple.iokit.IOSerialFamily          10.0.7

com.apple.iokit.IOSurface          91

com.apple.iokit.IOBluetoothFamily          4.2.0f6

com.apple.kext.triggers          1.0

com.apple.driver.DspFuncLib          2.5.3fc1

com.apple.vecLib.kext          1.0.0

com.apple.iokit.IOAudioFamily          1.9.4fc11

com.apple.kext.OSvKernDSPLib          1.14

com.apple.iokit.IOFireWireAVC          4.2.2

com.apple.driver.AppleHDAController          2.5.3fc1

com.apple.iokit.IOHDAFamily          2.5.3fc1

com.apple.driver.AppleSMC          3.1.6d1

com.apple.driver.IOPlatformPluginLegacy          1.0.0

com.apple.driver.IOPlatformPluginFamily          5.5.1d27

com.apple.iokit.IOBluetoothHostControllerUSBTransport          4.2.0f6

com.apple.iokit.IOFireWireIP          2.2.5

com.apple.driver.AppleBacklightExpert          1.0.4

com.apple.driver.AppleSMBusController          1.0.11d1

com.apple.iokit.IONDRVSupport          2.3.6

com.apple.kext.AMDSupport          1.1.4

com.apple.AppleGraphicsDeviceControl          3.4.12

com.apple.iokit.IOGraphicsFamily          2.3.6

com.apple.driver.AppleUSBHIDMouse          180.9

com.apple.driver.AppleHIDMouse          180.9

com.apple.driver.AppleUSBHIDKeyboard          170.15

com.apple.driver.AppleHIDKeyboard          170.15

com.apple.iokit.IOUSBHIDDriver          650.4.4

com.apple.iokit.IOSCSIBlockCommandsDevice          3.6.0

com.apple.iokit.IOFireWireSerialBusProtocolTransport          2.5.1

com.apple.iokit.IOFireWireSBP2          4.2.5

com.apple.driver.AppleUSBMergeNub          650.4.0

com.apple.driver.AppleUSBComposite          650.4.0

com.apple.iokit.IOSCSIMultimediaCommandsDevice          3.6.0

com.apple.iokit.IOBDStorageFamily          1.7

com.apple.iokit.IODVDStorageFamily          1.7.1

com.apple.iokit.IOCDStorageFamily          1.7.1

com.apple.iokit.IOATAPIProtocolTransport          3.5.0

com.apple.iokit.IOSCSIArchitectureModelFamily          3.6.0

com.apple.iokit.IOUSBUserClient          650.4.4

com.apple.iokit.IO80211Family          600.34

com.apple.iokit.IONetworkingFamily          3.2

com.apple.iokit.IOFireWireFamily          4.5.5

com.apple.iokit.IOAHCIFamily          2.6.0

com.apple.iokit.IOATAFamily          2.5.2

com.apple.iokit.IOUSBFamily          650.4.4

com.apple.driver.AppleEFINVRAM          2.0

com.apple.driver.AppleEFIRuntime          2.0

com.apple.iokit.IOHIDFamily          2.0.0

com.apple.iokit.IOSMBusFamily          1.1

com.apple.security.sandbox          278.10

com.apple.kext.AppleMatch          1.0.0d1

com.apple.security.TMSafetyNet          7

com.apple.driver.AppleKeyStore          2

com.apple.driver.DiskImages          371.1

com.apple.iokit.IOStorageFamily          1.9

com.apple.iokit.IOReportFamily          21

com.apple.driver.AppleFDEKeyStore          28.30

com.apple.driver.AppleACPIPlatform          2.0

com.apple.iokit.IOPCIFamily          2.8

com.apple.iokit.IOACPIFamily          1.4

com.apple.kec.corecrypto          1.0

com.apple.kec.pthread          1

Model: iMac8,1, BootROM IM81.00C1.B00, 2 processors, Intel Core 2 Duo, 3.06 GHz, 4 GB, SMC 1.30f1

Graphics: ATI Radeon HD 2600 Pro, ATI Radeon HD 2600 Pro, PCIe, 256 MB

Memory Module: BANK 0/DIMM0, 2 GB, DDR2 SDRAM, 800 MHz, 0xCE00000000000000, 0x4D3420373054353636335148332D43463720

Memory Module: BANK 1/DIMM1, 2 GB, DDR2 SDRAM, 800 MHz, 0xCE00000000000000, 0x4D3420373054353636335148332D43463720

AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0x8C), Broadcom BCM43xx 1.0 (5.10.131.36.16)

Bluetooth: Version 4.2.0f6 12982, 3 services, 23 devices, 1 incoming serial ports

Network Service: AirPort, AirPort, en1

Serial ATA Device: ST31000524AS, 1 TB

Parallel ATA Device: MATSHITADVD-R   UJ-875

USB Device: Built-in iSight

USB Device: Hub

USB Device: Keyboard Hub

USB Device: Apple Optical USB Mouse

USB Device: iLok

USB Device: Apple Keyboard

USB Device: IR Receiver

USB Device: BRCM2046 Hub

USB Device: Bluetooth USB Host Controller

FireWire Device: Mbox 2 Pro, DIGIDESIGN, Up to 400 Mb/sec

Thunderbolt Bus: