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mac – How to diagnose too many kernel panics on a 2017 21″ Retina iMac running Monterey

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This on a 2017 Retina 21″ iMac Running MacOS 12.4

The day before I installed 12.4 I had a kernel panic. The day after I installed it I had four kernel panics in rapid succession in the space of a half hour. Since then I have had more. Sometimes a day goes by without one, sometimes there are several in a day. I have read and, for the most part, followed this:

If Your Mac Restarts and a Message Appears

The Kernel-YYYY-MM-DD-hhmmss.panic logs (/Library/Logs/DiagnosticReports/) offer no clues as to what software/hardware might be causing the panics

So far I have:

• Removed an external display and adapter
• Removed a USB hub
• Notremoved a non-Apple (Logitech) keyboard as the machine would be useless without it.
• Not removed an external drives as the machine would be useless to me without them

I started the machine in Recovery Mode and:

• Ran Disk First aid on the boot volume: No problems found
• Reinstalled MacOS

I started the machine in Diagnostics Mode and ran diagnostics: No problems found

The only extensions I have are those installed by:

• Graphic Converter
• Bartender
• Dropbox
• Google Drive
• Markup

The external drives that I have not removed have all been running fine on the machine for well over a year. I’ve had the keyboard for about 18 months.

I have attached the first few lines of the most recent panic report. This one happens to show that iStat menus was the panicked task, but I don’t think that means much. Every panic reports shows a different process as the panicked task.

Any ideas?

/Library/Logs/DiagnosticReports/Kernel-2022-05-26-212610.panic:

Machine-check capabilities: 0x0000000000000c0a
 family: 6 model: 158 stepping: 9 microcode: 240
 signature: 0x906e9
 Intel(R) Core(TM) i5-7500 CPU @ 3.40GHz
 10 error-reporting banks
Processor 0: IA32_MCG_STATUS: 0x0000000000000005
 IA32_MC0_STATUS(0x401): 0xb200000000030005
mp_kdp_enter() timed-out on cpu 0, NMI-ing
mp_kdp_enter() NMI pending on cpus: 0 1 2 3
mp_kdp_enter() timed-out during locked wait after NMI;expected 4 acks but received 1 after 9777577 loops in 1704000001 ticks
panic(cpu 0 caller 0xffffff80125d19d7): Machine Check at 0x00007ff90ac433bc, registers:
CR0: 0x0000000080010033, CR2: 0x00007ff8493aff10, CR3: 0x0000000317eaa290, CR4: 0x00000000003626e0
RAX: 0x0000000647035480, RBX: 0x0000000647035480, RCX: 0x000000064738eb40, RDX: 0x0000000000000002
RSP: 0x00007ff7be0a68e0, RBP: 0x00007ff7be0a7fb0, RSI: 0x0000000631cc3540, RDI: 0x000000063b058910
R8:  0x0000000000000028, R9:  0x00000006473e10bc, R10: 0x00000006562230bc, R11: 0x00000006473e10bc
R12: 0x000000064720c300, R13: 0x000000064720c300, R14: 0x000000064720c300, R15: 0x0000000649c834c0
RFL: 0x0000000000000202, RIP: 0x00007ff90ac433bc, CS:  0x000000000000002b, SS:  0x0000000000000023
Error code: 0x0000000000000000
 @trap_native.c:168
Panicked task 0xffffffaa0b11f030: 14 threads: pid 84291: com.apple.WebKit
Backtrace (CPU 0), panicked thread: 0xffffffaa11660540, Frame : Return Address
0xffffffb0e0ba3b10 : 0xffffff8012481c8d
0xffffffb0e0ba3b60 : 0xffffff80125e1596
0xffffffb0e0ba3ba0 : 0xffffff80125d0963
0xffffffb0e0ba3bf0 : 0xffffff8012421a70
0xffffffb0e0ba3c10 : 0xffffff801248205d
0xffffffb0e0ba3d30 : 0xffffff8012481816
0xffffffb0e0ba3d90 : 0xffffff8012d15163
0xffffffb0e0ba3e80 : 0xffffff80125d19d7
0xffffffb0e0ba3f90 : 0xffffff8012d1c94c
0xffffffb0e0ba3fa0 : 0xffffff80124222cf

Process name corresponding to current thread (0xffffffaa11660540): com.apple.WebKit.WebContent

Mac OS version:
21F79

Kernel version:
Darwin Kernel Version 21.5.0: Tue Apr 26 21:08:22 PDT 2022; root:xnu-8020.121.3~4/RELEASE_X86_64
Kernel UUID: 3C587984-4004-3C76-8ADF-997822977184
KernelCache slide: 0x0000000012200000
KernelCache base:  0xffffff8012400000
Kernel slide:      0x0000000012210000
Kernel text base:  0xffffff8012410000
__HIB  text base: 0xffffff8012300000
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: 53333735341979
Last Sleep:           absolute           base_tsc          base_nano
  Uptime  : 0x00003081ba598209
  Sleep   : 0x0000000000000000 0x0000000000000000 0x0000000000000000
  Wake    : 0x0000000000000000 0x00000011b8f5a008 0x0000000000000000
Compressor Info: 4% of compressed pages limit (OK) and 5% of segments limit (OK) with 1 swapfiles and OK swap space
Zone info:
  Zone map: 0xffffff907bbb4000 - 0xffffffb07bbb4000
  . PGZ   : 0xffffff907bbb4000 - 0xffffff907dbb5000
  . VM    : 0xffffff907dbb5000 - 0xffffff954a3b4000
  . RO    : 0xffffff954a3b4000 - 0xffffff96e3bb4000
  . GEN0  : 0xffffff96e3bb4000 - 0xffffff9bb03b4000
  . GEN1  : 0xffffff9bb03b4000 - 0xffffffa07cbb4000
  . GEN2  : 0xffffffa07cbb4000 - 0xffffffa5493b4000
  . GEN3  : 0xffffffa5493b4000 - 0xffffffaa15bb4000
  . DATA  : 0xffffffaa15bb4000 - 0xffffffb07bbb4000
  Metadata: 0xffffffb07bbc4000 - 0xffffffb09bbc4000
  Bitmaps : 0xffffffb09bbc4000 - 0xffffffb0a1bc4000

last started kext at 78949547802: @filesystems.smbfs    4.0 (addr 0xffffff7fab938000, size 483328)
last stopped kext at 277114639064: >!AThunderboltEDMSink    5.0.3 (addr 0xffffff7fab1c7000, size 32768)
loaded kexts:
@filesystems.smbfs  4.0
@filesystems.autofs 3.0
>!ATopCaseHIDEventDriver    5450.8
>AudioAUUC  1.70
>X86PlatformShim    1.0.0
>!APlatformEnabler  2.7.0d0
>AGPM   129
>!AUpstreamUserClient   3.6.9
@kext.AMDFramebuffer    4.0.8
@kext.AMDRadeonServiceManager   4.0.8
@kext.AMDRadeonX4000    4.0.8
>!AGraphicsDevicePolicy 6.5.7
>!AHDA  340.2
@AGDCPluginDisplayMetrics   6.5.7
>pmtelemetry    1
|IOUserEthernet 1.0.1
>usb.!UUserHCI  1
>!AHV   1
>!ADiskImages2  126.100.13
>!AGFXHDA   140.3
>!A!IKBLGraphics    18.0.7
>!AMCCSControl  1.16
>!A!ISlowAdaptiveClocking   4.0.0
>eficheck   1
>!A!IPCHPMC 2.0.1
>!ASMCLMU   212
@kext.AMD9500!C 4.0.8
>!AThunderboltIP    4.0.3
>!A!IKBLGraphicsFramebuffer 18.0.7
|SCSITaskUserClient 456.121.3
>!AFileSystemDriver 3.0.1
@filesystems.tmpfs  1
@filesystems.lifs   1
@filesystems.hfs.kext   583.100.10
@BootCache  40
@!AFSCompression.!AFSCompressionTypeZlib    1.0.0
@!AFSCompression.!AFSCompressionTypeDataless    1.0.0d1
@filesystems.apfs   1934.121.2
>AirPort.BrcmNIC    1400.1.1
>!ASDXC 3.2.1
|!ABCM5701Ethernet  11.0.0
>!AAHCIPort 351.100.4
@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
>driverkit.serial   6.0.0
|IOSerial!F 11
@kext.triggers  1.0
>!AActuatorDriver   5450.14
>!AMultitouchDriver 5450.14
>!AInputDeviceSupport   5450.4
>!AHS!BDriver   5450.8
>IO!BHIDDriver  9.0.0
@kext.AMDRadeonX4200HWLibs  1.0
@kext.AMDRadeonX4000HWServices  4.0.8
>!AGraphicsControl  6.5.7
>DspFuncLib 340.2
@kext.OSvKernDSPLib 529
|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    1040.6
@plugin.IOgPTPPlugin    1040.3
|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
>X86PlatformPlugin  1.0.0
>!AAudioClockLibs   140.1
@!AGPUWrangler  6.5.7
|IOSlowAdaptiveClocking!F   1.0.0
|IONDRVSupport  597
>IOPlatformPlugin!F 6.0.0d8
>!ASMBus!C  1.0.18d1
>!AHDA!C    340.2
|IOHDA!F    340.2
|IOAudio!F  340.2
@vecLib.kext    1.2.0
>!ASMBusPCI 1.0.14d1
@kext.AMDSupport    4.0.8
>!AThunderboltDPOutAdapter  8.5.1
|IOAccelerator!F2   462.8
@!AGraphicsDeviceControl    6.5.7
|IOGraphics!F   597
>usb.IOUSBHostHIDDevice 1.2
>usb.cdc    5.0.0
>usb.networking 5.0.0
>usb.!UHostCompositeDevice  1.2
>!AThunderboltPCIDownAdapter    4.1.1
>!AThunderboltDPInAdapter   8.5.1
>!AThunderboltDPAdapter!F   8.5.1
>!AHPM  3.4.4
>!A!ILpssI2C!C  3.0.60
>!A!ILpssI2C    3.0.60
>!A!ILpssDmac   3.0.60
>!ABSDKextStarter   3
|IOSurface  302.14
@filesystems.hfs.encodings.kext 1
>!AXsanScheme   3
>!AThunderboltNHI   7.2.81
|IOThunderbolt!F    9.3.3
|IO80211!FLegacy    1200.12.2b1
|IOSkywalk!F    1.0
>corecapture    1.0.4
|IONVMe!F   2.1.0
>mDNSOffloadUserClient  1.0.1b8
|IOAHCI!F   297
>!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   1040.3
|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  533.120.2
|IOUSBMass!SDriver  210.120.3
|IOSCSIBlockCommandsDevice  456.121.3
|IO!S!F 2.1
|IOSCSIArchitectureModel!F  456.121.3
>!AMobileFileIntegrity  1.0.5
$!AImage4   4.2.0
@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

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