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Imac 2011 27, black screen and kernel panic

Hello, Since yesterday night, i've got 3 black screen and kernel panic when i'm using my imac. I have to unplug it, if i want to restart without black screen. Could you help me, here is the log :



Anonymous UUID: 1E1E53C9-A8A1-BB8D-16AD-7573CE81F742



Sat Feb 1 23:37:59 2014

panic(cpu 1 caller 0xffffff8008edc19e): Kernel trap at 0xffffff8009194b10, type 14=page fault, registers:

CR0: 0x0000000080010033, CR2: 0xfffffffff6610010, CR3: 0x00000002fb551064, CR4: 0x00000000000606e0

RAX: 0xfffffffff6610010, RBX: 0xffffff801be7b8a8, RCX: 0x0000000000000000, RDX: 0x0000000000000010

RSP: 0xffffff801be7b788, RBP: 0xffffff801be7b7e0, RSI: 0xffffff80258612e4, RDI: 0xffffff8025861000

R8: 0xffffff801be7beec, R9: 0x0000000000000288, R10: 0xffffff801be7b8a8, R11: 0x0000000000000202

R12: 0x0000000000000000, R13: 0xffffff8025861000, R14: 0xffffff801be7b860, R15: 0xffffff80091e4140

RFL: 0x0000000000010246, RIP: 0xffffff8009194b10, CS: 0x0000000000000008, SS: 0x0000000000000010

Fault CR2: 0xfffffffff6610010, Error code: 0x0000000000000002, Fault CPU: 0x1



Backtrace (CPU 1), Frame : Return Address

0xffffff801be7b410 : 0xffffff8008e22f69

0xffffff801be7b490 : 0xffffff8008edc19e

0xffffff801be7b660 : 0xffffff8008ef3606

0xffffff801be7b680 : 0xffffff8009194b10

0xffffff801be7b7e0 : 0xffffff80091d6bda

0xffffff801be7b840 : 0xffffff80091e2c59

0xffffff801be7bd50 : 0xffffff80091e546b

0xffffff801be7bdb0 : 0xffffff80091e566c

0xffffff801be7be90 : 0xffffff80091e1955

0xffffff801be7bf50 : 0xffffff800923de23

0xffffff801be7bfb0 : 0xffffff8008ef3e06



BSD process name corresponding to current thread: ReportCrash



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: 0x0000000008c00000

Kernel text base: 0xffffff8008e00000

System model name: iMac12,2 (Mac-942B59F58194171B)



System uptime in nanoseconds: 137068336821414

last loaded kext at 136726155605970: com.rogueamoeba.InstantOn 6.0.3 (addr 0xffffff7f8b36f000, size 16384)

last unloaded kext at 136868706821530: com.rogueamoeba.InstantOn 6.0.3 (addr 0xffffff7f8b36f000, size 12288)

loaded kexts:

com.apple.driver.AppleBluetoothMultitouch 80.14

com.apple.driver.AudioAUUC 1.60

com.apple.driver.AppleHWSensor 1.9.5d0

com.apple.filesystems.autofs 3.0

com.apple.iokit.IOBluetoothSerialManager 4.2.0f6

com.apple.driver.AGPM 100.14.11

com.apple.driver.AppleMikeyHIDDriver 124

com.apple.driver.AppleHDA 2.5.3fc1

com.apple.driver.AppleUpstreamUserClient 3.5.13

com.apple.kext.AMDFramebuffer 1.1.4

com.apple.iokit.IOUserEthernet 1.0.0d1

com.apple.driver.AppleMikeyDriver 2.5.3fc1

com.apple.AMDRadeonX3000 1.1.4

com.apple.driver.AppleBacklight 170.3.5

com.apple.Dont_Steal_Mac_OS_X 7.0.0

com.apple.driver.AppleHWAccess 1

com.apple.driver.AppleLPC 1.7.0

com.apple.kext.AMD6000Controller 1.1.4

com.apple.driver.AppleMCCSControl 1.1.12

com.apple.driver.AppleSMCLMU 2.0.4d1

com.apple.driver.AppleIntelHD3000Graphics 8.1.8

com.apple.iokit.BroadcomBluetoothHostControllerUSBTransport 4.2.0f6

com.apple.driver.AppleSMCPDRC 1.0.0

com.apple.driver.ACPI_SMC_PlatformPlugin 1.0.0

com.apple.driver.AppleThunderboltIP 1.0.10

com.apple.driver.AppleIntelSNBGraphicsFB 8.1.8

com.apple.driver.AppleIRController 325.7

com.apple.driver.AppleUSBCardReader 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.driver.AirPort.Atheros40 700.74.5

com.apple.driver.AppleFWOHCI 4.9.9

com.apple.iokit.AppleBCM5701Ethernet 3.6.9b9

com.apple.driver.AppleAHCIPort 2.9.5

com.apple.driver.AppleUSBEHCI 650.4.1

com.apple.driver.AppleRTC 2.0

com.apple.driver.AppleACPIButtons 2.0

com.apple.driver.AppleHPET 1.8

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.driver.AppleBluetoothHIDKeyboard 170.15

com.apple.driver.AppleHIDKeyboard 170.15

com.apple.driver.IOBluetoothHIDDriver 4.2.0f6

com.apple.driver.AppleMultitouchDriver 245.13

com.apple.kext.triggers 1.0

com.apple.iokit.IOSerialFamily 10.0.7

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.IOSurface 91

com.apple.iokit.IOAcceleratorFamily 98.7.1

com.apple.iokit.IOBluetoothFamily 4.2.0f6

com.apple.driver.AppleBacklightExpert 1.0.4

com.apple.kext.AMDSupport 1.1.4

com.apple.AppleGraphicsDeviceControl 3.4.12

com.apple.driver.AppleSMBusController 1.0.11d1

com.apple.iokit.IOFireWireIP 2.2.5

com.apple.driver.AppleSMBusPCI 1.0.12d1

com.apple.driver.AppleHDAController 2.5.3fc1

com.apple.iokit.IOHDAFamily 2.5.3fc1

com.apple.iokit.IONDRVSupport 2.3.6

com.apple.iokit.IOBluetoothHostControllerUSBTransport 4.2.0f6

com.apple.driver.AppleSMC 3.1.6d1

com.apple.driver.IOPlatformPluginLegacy 1.0.0

com.apple.driver.IOPlatformPluginFamily 5.5.1d27

com.apple.driver.AppleThunderboltEDMSink 1.2.1

com.apple.iokit.IOGraphicsFamily 2.3.6

com.apple.driver.AppleThunderboltDPOutAdapter 2.5.0

com.apple.driver.AppleThunderboltDPInAdapter 2.5.0

com.apple.driver.AppleThunderboltDPAdapterFamily 2.5.0

com.apple.driver.AppleThunderboltPCIDownAdapter 1.4.0

com.apple.iokit.IOUSBHIDDriver 650.4.4

com.apple.iokit.IOSCSIBlockCommandsDevice 3.6.0

com.apple.iokit.IOUSBMassStorageClass 3.6.0

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.IOAHCISerialATAPI 2.6.0

com.apple.iokit.IOSCSIArchitectureModelFamily 3.6.0

com.apple.iokit.IOUSBUserClient 650.4.4

com.apple.driver.AppleThunderboltNHI 1.9.2

com.apple.iokit.IOThunderboltFamily 2.8.5

com.apple.iokit.IO80211Family 600.34

com.apple.iokit.IOFireWireFamily 4.5.5

com.apple.iokit.IOEthernetAVBController 1.0.3b3

com.apple.driver.mDNSOffloadUserClient 1.0.1b4

com.apple.iokit.IONetworkingFamily 3.2

com.apple.iokit.IOAHCIFamily 2.6.0

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



System Profile:

Model: iMac12,2, BootROM IM121.0047.B1F, 4 processors, Intel Core i5, 2.7 GHz, 12 GB, SMC 1.72f2

Graphics: AMD Radeon HD 6770M, AMD Radeon HD 6770M, PCIe, 512 MB

Memory Module: BANK 0/DIMM0, 4 GB, DDR3, 1333 MHz, 0x029E, 0x434D534F344758334D314131333333433920

Memory Module: BANK 1/DIMM0, 4 GB, DDR3, 1333 MHz, 0x029E, 0x434D534F344758334D314131333333433920

Memory Module: BANK 0/DIMM1, 2 GB, DDR3, 1333 MHz, 0x80CE, 0x4D34373142353637334648302D4348392020

Memory Module: BANK 1/DIMM1, 2 GB, DDR3, 1333 MHz, 0x80CE, 0x4D34373142353637334648302D4348392020

AirPort: spairport_wireless_card_type_airport_extreme (0x168C, 0x9A), Atheros 9380: 4.0.74.0-P2P

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

Network Service: Wi-Fi, AirPort, en1

Serial ATA Device: ST31000528AS, 1 TB

Serial ATA Device: OCZ-VERTEX4, 256,06 GB

Serial ATA Device: HL-DT-STDVDRW GA32N

USB Device: FaceTime HD Camera (Built-in)

USB Device: Hub

USB Device: BRCM2046 Hub

USB Device: Bluetooth USB Host Controller

USB Device: Hub

USB Device: EyeTV DTT Dlx

USB Device: Internal Memory Card Reader

USB Device: IR Receiver

Thunderbolt Bus: iMac, Apple Inc., 22.1


Another log today :


Anonymous UUID: 1E1E53C9-A8A1-BB8D-16AD-7573CE81F742



Sun Feb 2 12:14:21 2014

panic(cpu 1 caller 0xffffff8007edc19e): Kernel trap at 0xffffff7f89cba042, type 6=invalid opcode, registers:

CR0: 0x0000000080010033, CR2: 0x000000010b016000, CR3: 0x0000000044b3f04a, CR4: 0x00000000000606e0

RAX: 0x0000000000000000, RBX: 0xffffff817e5dc768, RCX: 0x00000000000002b6, RDX: 0x0000000000000a00

RSP: 0xffffff815aabb940, RBP: 0xffffff815aabb970, RSI: 0x0000000000000000, RDI: 0xffffff8030cb2000

R8: 0x0000000000000000, R9: 0xffffff8030cb2000, R10: 0x0000000000000000, R11: 0x00000000001b5f00

R12: 0x00000000000002b4, R13: 0x0000000000000000, R14: 0xffffff817e5dc768, R15: 0xffffff8030cb2000

RFL: 0x0000000000010293, RIP: 0xffffff7f89cba042, CS: 0x0000000000000008, SS: 0x0000000000000010

Fault CR2: 0x000000010b016000, Error code: 0x0000000000000000, Fault CPU: 0x1



Backtrace (CPU 1), Frame : Return Address

0xffffff815aabb5d0 : 0xffffff8007e22f69

0xffffff815aabb650 : 0xffffff8007edc19e

0xffffff815aabb820 : 0xffffff8007ef3606

0xffffff815aabb840 : 0xffffff7f89cba042

0xffffff815aabb970 : 0xffffff7f89cb2500

0xffffff815aabb990 : 0xffffff7f89c2d571

0xffffff815aabb9c0 : 0xffffff7f89cb6085

0xffffff815aabba00 : 0xffffff7f89c2d6de

0xffffff815aabba30 : 0xffffff7f89c39031

0xffffff815aabba90 : 0xffffff7f89c2bd05

0xffffff815aabbb20 : 0xffffff80082cccda

0xffffff815aabbb40 : 0xffffff80082cd83e

0xffffff815aabbba0 : 0xffffff80082cb28f

0xffffff815aabbcf0 : 0xffffff8007eb6008

0xffffff815aabbe00 : 0xffffff8007e26bb1

0xffffff815aabbe30 : 0xffffff8007e139b5

0xffffff815aabbea0 : 0xffffff8007e1e003

0xffffff815aabbf20 : 0xffffff8007ec90dd

0xffffff815aabbfb0 : 0xffffff8007ef3bd8

Kernel Extensions in backtrace:

com.apple.iokit.IOAcceleratorFamily(98.7.1)[024BF8EC-2925-3C4B-ADBB-CFE36F7D41C 5]@0xffffff7f89c22000->0xffffff7f89c7afff

dependency: com.apple.iokit.IOPCIFamily(2.8)[447B4896-16FF-3616-95A2-1C516B2A1498]@0xffffff 7f884ba000

dependency: com.apple.iokit.IOGraphicsFamily(2.3.6)[38E388A5-92D6-3388-B799-F2498E582287]@0 xffffff7f88d54000

com.apple.AMDRadeonX3000(1.1.4)[4333F950-8969-31AB-93E2-DF7D2DE76A9F]@0xffffff7 f89c87000->0xffffff7f8a027fff

dependency: com.apple.iokit.IOAcceleratorFamily(98.7.1)[024BF8EC-2925-3C4B-ADBB-CFE36F7D41C 5]@0xffffff7f89c22000

dependency: com.apple.iokit.IOPCIFamily(2.8)[447B4896-16FF-3616-95A2-1C516B2A1498]@0xffffff 7f884ba000

dependency: com.apple.iokit.IOGraphicsFamily(2.3.6)[38E388A5-92D6-3388-B799-F2498E582287]@0 xffffff7f88d54000



BSD process name corresponding to current thread: EyeTV



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: 0x0000000007c00000

Kernel text base: 0xffffff8007e00000

System model name: iMac12,2 (Mac-942B59F58194171B)



System uptime in nanoseconds: 2520159617361

last loaded kext at 2481923953512: com.rogueamoeba.InstantOn 6.0.3 (addr 0xffffff7f8a378000, size 16384)

last unloaded kext at 305262583940: com.apple.filesystems.msdosfs 1.9 (addr 0xffffff7f8a378000, size 57344)

loaded kexts:

com.rogueamoeba.InstantOn 6.0.3

com.avast.AvastFileShield 2.1.0

com.avast.PacketForwarder 1.4

com.apple.driver.AppleBluetoothMultitouch 80.14

com.apple.driver.AudioAUUC 1.60

com.apple.driver.AppleHWSensor 1.9.5d0

com.apple.filesystems.autofs 3.0

com.apple.iokit.IOBluetoothSerialManager 4.2.0f6

com.apple.driver.AGPM 100.14.11

com.apple.driver.AppleMikeyHIDDriver 124

com.apple.driver.AppleHDA 2.5.3fc1

com.apple.iokit.IOUserEthernet 1.0.0d1

com.apple.driver.AppleUpstreamUserClient 3.5.13

com.apple.iokit.BroadcomBluetoothHostControllerUSBTransport 4.2.0f6

com.apple.driver.AppleLPC 1.7.0

com.apple.Dont_Steal_Mac_OS_X 7.0.0

com.apple.driver.AppleHWAccess 1

com.apple.driver.ACPI_SMC_PlatformPlugin 1.0.0

com.apple.driver.AppleThunderboltIP 1.0.10

com.apple.kext.AMDFramebuffer 1.1.4

com.apple.driver.AppleBacklight 170.3.5

com.apple.driver.AppleMCCSControl 1.1.12

com.apple.driver.AppleSMCPDRC 1.0.0

com.apple.driver.AppleSMCLMU 2.0.4d1

com.apple.driver.AppleMikeyDriver 2.5.3fc1

com.apple.AMDRadeonX3000 1.1.4

com.apple.kext.AMD6000Controller 1.1.4

com.apple.driver.AppleIntelHD3000Graphics 8.1.8

com.apple.driver.AppleIntelSNBGraphicsFB 8.1.8

com.apple.driver.AppleUSBCardReader 3.3.5

com.apple.driver.AppleIRController 325.7

com.apple.iokit.SCSITaskUserClient 3.6.0

com.apple.AppleFSCompression.AppleFSCompressionTypeDataless 1.0.0d1

com.apple.AppleFSCompression.AppleFSCompressionTypeZlib 1.0.0d1

com.apple.BootCache 35

com.apple.driver.XsanFilter 404

com.apple.iokit.IOAHCIBlockStorage 2.4.0

com.apple.driver.AppleUSBHub 650.4.4

com.apple.driver.AirPort.Atheros40 700.74.5

com.apple.driver.AppleFWOHCI 4.9.9

com.apple.iokit.AppleBCM5701Ethernet 3.6.9b9

com.apple.driver.AppleAHCIPort 2.9.5

com.apple.driver.AppleUSBEHCI 650.4.1

com.apple.driver.AppleRTC 2.0

com.apple.driver.AppleACPIButtons 2.0

com.apple.driver.AppleHPET 1.8

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.driver.AppleBluetoothHIDKeyboard 170.15

com.apple.driver.AppleHIDKeyboard 170.15

com.apple.driver.IOBluetoothHIDDriver 4.2.0f6

com.apple.driver.AppleMultitouchDriver 245.13

com.apple.kext.triggers 1.0

com.apple.iokit.IOSerialFamily 10.0.7

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.IOSurface 91

com.apple.iokit.IOBluetoothFamily 4.2.0f6

com.apple.iokit.IOBluetoothHostControllerUSBTransport 4.2.0f6

com.apple.driver.IOPlatformPluginLegacy 1.0.0

com.apple.driver.AppleThunderboltEDMSink 1.2.1

com.apple.driver.AppleBacklightExpert 1.0.4

com.apple.driver.IOPlatformPluginFamily 5.5.1d27

com.apple.iokit.IOFireWireIP 2.2.5

com.apple.driver.AppleSMC 3.1.6d1

com.apple.driver.AppleHDAController 2.5.3fc1

com.apple.iokit.IOHDAFamily 2.5.3fc1

com.apple.driver.AppleSMBusController 1.0.11d1

com.apple.driver.AppleSMBusPCI 1.0.12d1

com.apple.iokit.IOAcceleratorFamily 98.7.1

com.apple.kext.AMDSupport 1.1.4

com.apple.AppleGraphicsDeviceControl 3.4.12

com.apple.iokit.IONDRVSupport 2.3.6

com.apple.iokit.IOGraphicsFamily 2.3.6

com.apple.driver.AppleThunderboltDPOutAdapter 2.5.0

com.apple.driver.AppleThunderboltDPInAdapter 2.5.0

com.apple.driver.AppleThunderboltDPAdapterFamily 2.5.0

com.apple.driver.AppleThunderboltPCIDownAdapter 1.4.0

com.apple.iokit.IOSCSIBlockCommandsDevice 3.6.0

com.apple.iokit.IOUSBMassStorageClass 3.6.0

com.apple.iokit.IOUSBHIDDriver 650.4.4

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.IOAHCISerialATAPI 2.6.0

com.apple.iokit.IOSCSIArchitectureModelFamily 3.6.0

com.apple.driver.AppleThunderboltNHI 1.9.2

com.apple.iokit.IOThunderboltFamily 2.8.5

com.apple.iokit.IOUSBUserClient 650.4.4

com.apple.iokit.IO80211Family 600.34

com.apple.iokit.IOFireWireFamily 4.5.5

com.apple.iokit.IOEthernetAVBController 1.0.3b3

com.apple.driver.mDNSOffloadUserClient 1.0.1b4

com.apple.iokit.IONetworkingFamily 3.2

com.apple.iokit.IOAHCIFamily 2.6.0

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



Thanks in advance for your help

iMac (27-inch Mid 2011), OS X Mavericks (10.9.1)

Posted on Feb 2, 2014 6:27 AM

Reply
Question marked as Best reply

Posted on Feb 2, 2014 8:03 AM

Remove the aftermarket memory modules and see whether there's an improvement.

3 replies

Feb 8, 2014 10:39 AM in response to Linc Davis

Hello, i've tried lot of configuration. The result is that the bank 1 slots have problems.

Now When i put memory in bank1/dimm0 or bank1/dimm1 i've a lot of problem (3 beep in apple test hardware mode, kernel panic, shootdown....)


So i put my two 4Go memories into bank0/dimm0 and bank0/dimm1 => No kernel panic


It's a pitty but i think i will not use bank1 free slots. Is the there a solution ?


Thanks for your help.


Florian

Feb 8, 2014 10:50 AM in response to florian.caillet

Make a "Genius" appointment at an Apple Store, or go to another authorized service provider.

Back up all data on the internal drive(s) before you hand over your computer to anyone. There are ways to back up a computer that isn't fully functional — ask if you need guidance.

If privacy is a concern, erase the data partition(s) with the option to write zeros* (do this only if you have at least two complete, independent backups, and you know how to restore to an empty drive from any of them.) Don’t erase the recovery partition, if present.

Keeping your confidential data secure during hardware repair

Apple also recommends that you deauthorize a device in the iTunes Store before having it serviced.

*An SSD doesn't need to be zeroed.

Imac 2011 27, black screen and kernel panic

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