I'm having an issue with a 2017 iMac - it doesn't boot - crashes about half way through Apple logo progress bar, often with some funny graphics displaying - e.g. half the screen is yellow.
I've reset NVRAM/PRAM/SMC, wiped hard disks and installed Big Sur, then upgrade to Monterey. Still I'm getting the same issue.
It does boot fine in safe mode...
I'm suspecting graphics card failure. I received these details on one failed start, can anybody help diagnose please?
```
panic(cpu 0 caller 0xffffff7facc1f244): "virtual bool IOAccelLegacyDisplayMachine::display_mode_did_change(uint32_t): AMDRadeonAccelerator driver returns false" @IOAccelLegacyDisplayMachine.cpp:267
Panicked task 0xffffff855221a3e0: 10 threads: pid 143: WindowServer
Backtrace (CPU 0), panicked thread: 0xffffff855177fcd0, Frame : Return Address
0xffffffe0970a3600 : 0xffffff801489c00d
0xffffffe0970a3650 : 0xffffff80149f5d85
0xffffffe0970a3690 : 0xffffff80149e5763
0xffffffe0970a36e0 : 0xffffff801483ba60
0xffffffe0970a3700 : 0xffffff801489c3dd
0xffffffe0970a3820 : 0xffffff801489bb96
0xffffffe0970a3880 : 0xffffff8015118649
0xffffffe0970a38f0 : 0xffffff7facc1f244
0xffffffe0970a3900 : 0xffffff7facbc7eee
0xffffffe0970a3940 : 0xffffff7facc11180
0xffffffe0970a3980 : 0xffffff7facd74c70
0xffffffe0970a3ac0 : 0xffffff7facd5f195
0xffffffe0970a3b50 : 0xffffff7facd6a627
0xffffffe0970a3b70 : 0xffffff7facd6f3c9
0xffffffe0970a3bf0 : 0xffffff7f95614a80
0xffffffe0970a3c20 : 0xffffff7facd64fb8
0xffffffe0970a3cb0 : 0xffffff801502957c
0xffffffe0970a3d10 : 0xffffff80150968d3
0xffffffe0970a3d70 : 0xffffff801499f007
0xffffffe0970a3dc0 : 0xffffff8014876cf9
0xffffffe0970a3e50 : 0xffffff801488dd89
0xffffffe0970a3ee0 : 0xffffff80149caaf2
0xffffffe0970a3fa0 : 0xffffff801483c246
Kernel Extensions in backtrace:
com.apple.iokit.IOGraphicsFamily(593.0)[D7EBF011-CEEF-3DF8-BD85-6CCE427455B7]@0xffffff7facd54000->0xffffff7facd82fff
dependency: com.apple.iokit.IOPCIFamily(2.9)[5E1B0BE0-4B73-35F5-9126-EB05FBB8BAF5]@0xffffff80173ee000->0xffffff8017418fff
com.apple.iokit.IOAcceleratorFamily2(462.4)[37BACF45-3C71-3411-97DB-E9AA07F37D0E]@0xffffff7facbc7000->0xffffff7facc30fff
dependency: com.apple.driver.AppleMobileFileIntegrity(1.0.5)[BB7769F7-6389-3ABC-A6CF-2BC079FA7BF8]@0xffffff8015f6f000->0xffffff8015f90fff
dependency: com.apple.iokit.IOGraphicsFamily(593)[D7EBF011-CEEF-3DF8-BD85-6CCE427455B7]@0xffffff7facd54000->0xffffff7facd82fff
dependency: com.apple.iokit.IOPCIFamily(2.9)[5E1B0BE0-4B73-35F5-9126-EB05FBB8BAF5]@0xffffff80173ee000->0xffffff8017418fff
dependency: com.apple.iokit.IOReportFamily(47)[81D7D4E0-A39C-332D-A4A4-AEBB70A9B6FF]@0xffffff801742a000->0xffffff801742cfff
dependency: com.apple.iokit.IOSurface(302.9)[F42646DD-8963-3EA4-BAC3-2D0F36CDA224]@0xffffff801755d000->0xffffff8017579fff
com.apple.kext.AMDFramebuffer(4.0.7)[0E573FD7-F1EF-3237-86D1-12C11C80C1FA]@0xffffff7f95613000->0xffffff7f95638fff
dependency: com.apple.iokit.IOACPIFamily(1.4)[7EF77A11-B2B8-3CCF-9188-597E1279EDAC]@0xffffff8016f48000->0xffffff8016f49fff
dependency: com.apple.iokit.IOGraphicsFamily(593)[D7EBF011-CEEF-3DF8-BD85-6CCE427455B7]@0xffffff7facd54000->0xffffff7facd82fff
dependency: com.apple.iokit.IOPCIFamily(2.9)[5E1B0BE0-4B73-35F5-9126-EB05FBB8BAF5]@0xffffff80173ee000->0xffffff8017418fff
dependency: com.apple.kext.AMDSupport(4.0.7)[61E40B4A-8B3E-3569-85EB-250CD91E8EB1]@0xffffff7fab20d000->0xffffff7fab2d7fff
Process name corresponding to current thread (0xffffff855177fcd0): WindowServer
Mac OS version:
21A559
Kernel version:
Darwin Kernel Version 21.1.0: Wed Oct 13 17:33:23 PDT 2021; root:xnu-8019.41.5~1/RELEASE_X86_64
Kernel UUID: 19BD4E1B-0268-3EE0-BC66-91F035BC9429
KernelCache slide: 0x0000000014600000
KernelCache base: 0xffffff8014800000
Kernel slide: 0x0000000014610000
Kernel text base: 0xffffff8014810000
__HIB text base: 0xffffff8014700000
System model name: iMac18,2 (Mac-77F17D7DA9285301)
System shutdown begun: NO
Panic diags file available: YES (0x0)
Hibernation exit count: 0
System uptime in nanoseconds: 11656145872
Last Sleep: absolute base_tsc base_nano
Uptime : 0x00000002b6c2ae6a
Sleep : 0x0000000000000000 0x0000000000000000 0x0000000000000000
Wake : 0x0000000000000000 0x0000000e05726742 0x0000000000000000
Zone info:
Foreign : 0xffffff802afb3000 - 0xffffff802afc0000
Native : 0xffffff804309e000 - 0xffffffa04309e000
Readonly : 0 - 0
Metadata : 0xffffffe7be2c3000 - 0xffffffe7de444000
Bitmaps : 0xffffffe7de444000 - 0xffffffe7e4444000
last started kext at 9537884636: >AudioAUUC 1.70 (addr 0xffffff7facac5000, size 12288)
loaded kexts:
>AudioAUUC 1.70
>!APlatformEnabler 2.7.0d0
>AGPM 125
>X86PlatformShim 1.0.0
@fileutil 20.036.15
@filesystems.autofs 3.0
>!AUpstreamUserClient 3.6.8
@kext.AMDFramebuffer 4.0.7
@kext.AMDRadeonX4000 4.0.7
>!AHDAHardwareConfigDriver 283.15
>!AHDA 283.15
>!AGFXHDA 100.1.434
@kext.AMDRadeonServiceManager 4.0.7
>!AThunderboltIP 4.0.3
@kext.AMD9500!C 4.0.7
>!A!IKBLGraphics 18.0.2
>eficheck 1
>AGDCBacklightControl 6.4.9
>!ABacklight 180.3
>!AMCCSControl 1.14
>!A!IPCHPMC 2.0.1
>!AGraphicsDevicePolicy 6.4.9
>ACPI_SMC_PlatformPlugin 1.0.0
@UVCService 1
@AGDCPluginDisplayMetrics 6.4.9
>!ASMCLMU 212
>pmtelemetry 1
|IOUserEthernet 1.0.1
>usb.!UUserHCI 1
>!AHV 1
>!ADiskImages2 126.40.1
>!A!ISlowAdaptiveClocking 4.0.0
>!AFIVRDriver 4.1.0
>!A!IKBLGraphicsFramebuffer 18.0.2
>!ATopCaseHIDEventDriver 5010.1
>!UTopCaseDriver 5010.1
>!AFileSystemDriver 3.0.1
@filesystems.tmpfs 1
@filesystems.lifs 1
@filesystems.hfs.kext 582.40.4
@BootCache 40
@!AFSCompression.!AFSCompressionTypeZlib 1.0.0
@!AFSCompression.!AFSCompressionTypeDataless 1.0.0d1
@filesystems.apfs 1933.41.2
>!ASDXC 3.1.1
>AirPort.BrcmNIC 1400.1.1
|!ABCM5701Ethernet 11.0.0
>!AAHCIPort 351
@private.KextAudit 1.0
>!AACPIButtons 6.1
>!ARTC 2.0.1
>!ASMBIOS 2.1
>!AACPIEC 6.1
>!AAPIC 1.7
@!ASystemPolicy 2.0.0
@nke.applicationfirewall 402
|IOKitRegistryCompatibility 1
|EndpointSecurity 1
@Dont_Steal_Mac_OS_X 7.0.0
@kec.!AEncryptedArchive 1
@kext.triggers 1.0
@kext.AMDRadeonX4200HWLibs 1.0
@kext.AMDRadeonX4000HWServices 4.0.7
>DspFuncLib 283.15
@kext.OSvKernDSPLib 529
>!AThunderboltEDMSink 5.0.3
>!AThunderboltDPOutAdapter 8.5.0
@kext.AMDSupport 4.0.7
>!UAudio 412.8
>!AAudioClockLibs 100.9.1
>!ABacklightExpert 1.1.0
|IONDRVSupport 593
>!AGraphicsControl 6.4.9
>IOPlatformPluginLegacy 1.0.0
>X86PlatformPlugin 1.0.0
>IOPlatformPlugin!F 6.0.0d8
>!AHDA!C 283.15
|IOHDA!F 283.15
|IOAudio!F 300.10
@vecLib.kext 1.2.0
>!ASMBus!C 1.0.18d1
>!ASMBusPCI 1.0.14d1
|IO!BSerialManager 9.0.0
|IO!BPacketLogger 9.0.0
|IO!BHost!CUSBTransport 9.0.0
|IO!BHost!CUARTTransport 9.0.0
|IO!BHost!CTransport 9.0.0
>IO!BHost!CPCIeTransport 9.0.0
|IOAVB!F 1010.2
@plugin.IOgPTPPlugin 1000.11
|IOEthernetAVB!C 1.1.0
|CSR!BHost!CUSBTransport 9.0.0
|Broadcom!BHost!CUSBTransport 9.0.0
|Broadcom!B20703USBTransport 9.0.0
>!AIPAppender 1.0
@!AGPUWrangler 6.4.9
|IOSlowAdaptiveClocking!F 1.0.0
|IOAccelerator!F2 462.4
@!AGraphicsDeviceControl 6.4.9
|IOGraphics!F 593
>!AHS!BDriver 5010.1
>IO!BHIDDriver 9.0.0
>!AMultitouchDriver 5400.25
>!AInputDeviceSupport 5400.30
>!AHIDKeyboard 228
>usb.IOUSBHostHIDDevice 1.2
>usb.cdc 5.0.0
>usb.networking 5.0.0
>usb.!UHostCompositeDevice 1.2
>!AThunderboltPCIDownAdapter 4.1.1
>!AThunderboltDPInAdapter 8.5.0
>!AThunderboltDPAdapter!F 8.5.0
>!AHPM 3.4.4
>!A!ILpssI2C!C 3.0.60
>!A!ILpssI2C 3.0.60
>!A!ILpssDmac 3.0.60
>!ABSDKextStarter 3
|IOSurface 302.9
@filesystems.hfs.encodings.kext 1
>!AXsanScheme 3
>!AThunderboltNHI 7.2.8
|IOThunderbolt!F 9.3.2
|IOAHCIBlock!S 333
|IO80211!FLegacy 1200.12.2b1
|IOSkywalk!F 1.0
>corecapture 1.0.4
>mDNSOffloadUserClient 1.0.1b8
|IOAHCI!F 295
>!A!ILpssGspi 3.0.60
>usb.!UXHCIPCI 1.2
>usb.!UXHCI 1.2
>usb.!UHostPacketFilter 1.0
|IOUSB!F 900.4.2
>!AEFINVRAM 2.1
>!AEFIRuntime 2.1
|IOSMBus!F 1.1
|IOHID!F 2.0.0
|IOTimeSync!F 1000.11
|IONetworking!F 3.4
>DiskImages 493.0.0
|IO!B!F 9.0.0
|IOReport!F 47
$quarantine 4
$sandbox 300.0
@kext.!AMatch 1.0.0d1
|CoreAnalytics!F 1
>!ASSE 1.0
>!AKeyStore 2
>!UTDM 532.40.7
|IOUSBMass!SDriver 209.40.6
|IOSCSIBlockCommandsDevice 452.30.4
|IO!S!F 2.1
|IOSCSIArchitectureModel!F 452.30.4
>!AMobileFileIntegrity 1.0.5
$!AImage4 4.1.0
@kext.CoreTrust 1
>!AFDEKeyStore 28.30
>!AEffaceable!S 1.0
>!ACredentialManager 1.0
>KernelRelayHost 1
|IOUSBHost!F 1.2
>!UHostMergeProperties 1.2
>usb.!UCommon 1.0
>!ABusPower!C 1.0
>!ASEPManager 1.0.1
>IOSlaveProcessor 1
>!AACPIPlatform 6.1
>!ASMC 3.1.9
|IOPCI!F 2.9
|IOACPI!F 1.4
>watchdog 1
@kec.pthread 1
@kec.Libm 1
@kec.corecrypto 12.0
```