Problem with 2019 iMac

[create90mph]

I am having a recent issue occurring with my 2019 iMac (Running Big Sur off internal SSD boot drive) over the past couple of days. Last week, when I went to my computer, it was displaying a flashing grey folder with a question mark. I rested the computer - got a kernel panic message and then it booted normally.

It happened again today - Following the most recent incident, I reset the NVRAM and ran first aid on the desk in recovery mode (per apple website instructions). Should I also reinstall MacOS as well?

Any recommendations on what I should do next if it reoccurs? What could be causing the problem?

Here is the kernel panic error:

panic(cpu 4 caller 0xffffff800a3c52a6): Kernel trap at 0xffffff800a345500, type 13=general protection, registers:
CR0: 0x0000000080010033, CR2: 0x000070000f2302b8, CR3: 0x0000000a4c8e3040, CR4: 0x00000000003626e0
RAX: 0x33ffff86f084b158, RBX: 0xffffff86f19f1960, RCX: 0x31ffff86f084b158, RDX: 0x0000000003000000
RSP: 0xffffffa0dac03ba0, RBP: 0xffffffa0dac03bd0, RSI: 0xffffff86f19f1960, RDI: 0xffffff86f084b158
R8: 0xffffff86f084b158, R9: 0xffffff86f19f1960, R10: 0xffffffdb1d7f3e70, R11: 0x0000000f86ef94f0
R12: 0xffffff86f0b43038, R13: 0x0000000000000000, R14: 0xffffff86f084b158, R15: 0xffffff86f084b140
RFL: 0x0000000000010246, RIP: 0xffffff800a345500, CS: 0x0000000000000008, SS: 0x0000000000000010
Fault CR2: 0x000070000f2302b8, Error code: 0x0000000000000000, Fault CPU: 0x4, PL: 0, VF: 0

Backtrace (CPU 4), Frame : Return Address
0xffffff800a1581e0 : 0xffffff800a28e02d
0xffffff800a158230 : 0xffffff800a3d48e3
0xffffff800a158270 : 0xffffff800a3c4eda
0xffffff800a1582c0 : 0xffffff800a232a2f
0xffffff800a1582e0 : 0xffffff800a28d84d
0xffffff800a158400 : 0xffffff800a28db43
0xffffff800a158470 : 0xffffff800aa9d68a
0xffffff800a1584e0 : 0xffffff800a3c52a6
0xffffff800a158660 : 0xffffff800a3c4f8d
0xffffff800a1586b0 : 0xffffff800a232a2f
0xffffff800a1586d0 : 0xffffff800a345500
0xffffffa0dac03bd0 : 0xffffff800a330e9e
0xffffffa0dac03c00 : 0xffffff800a37958b
0xffffffa0dac03c20 : 0xffffff800a29448f
0xffffffa0dac03c40 : 0xffffff800a273180
0xffffffa0dac03cf0 : 0xffffff800a293be7
0xffffffa0dac03d20 : 0xffffff800a293512
0xffffffa0dac03d90 : 0xffffff800a269c85
0xffffffa0dac03df0 : 0xffffff800a2947ec
0xffffffa0dac03e20 : 0xffffff800a277eda
0xffffffa0dac03ea0 : 0xffffff800a282148
0xffffffa0dac03ed0 : 0xffffff800a27f173
0xffffffa0dac03ef0 : 0xffffff800a3a91fd
0xffffffa0dac03fa0 : 0xffffff800a233216

Process name corresponding to current thread: WindowServer

Mac OS version:
20E232

Kernel version:
Darwin Kernel Version 20.4.0: Fri Mar 5 01:14:14 PST 2021; root:xnu-7195.101.1~3/RELEASE_X86_64
Kernel UUID: BB2FFEBA-7D53-301F-A238-9867CA51276F
KernelCache slide: 0x000000000a000000
KernelCache base: 0xffffff800a200000
Kernel slide: 0x000000000a010000
Kernel text base: 0xffffff800a210000
__HIB text base: 0xffffff800a100000
System model name: iMac19,1 (Mac-AA95B1DDAB278B95)
System shutdown begun: NO
Panic diags file available: YES (0x0)
Hibernation exit count: 0

System uptime in nanoseconds: 29096253854935
Last Sleep: absolute base_tsc base_nano
Uptime : 0x00001a767fe016ed
Sleep : 0x00001a7679605b70 0x00000000dd887ed6 0x00001a6a12da39e0
Wake : 0x00001a767f3c654b 0x00000000dd508e02 0x00001a767d13acd4
last started kext at 28529211806032: >usb.cdc.acm 5.0.0 (addr 0xffffff7fa350e000, size 8192)
last stopped kext at 28290903885117: >!UAudio 405.39 (addr 0xffffff7fa3512000, size 315392)
loaded kexts:
@fileutil 20.036.15
@filesystems.autofs 3.0
>!ATopCaseHIDEventDriver 4040.11
>AudioAUUC 1.70
>AGPM 122
>!APlatformEnabler 2.7.0d0
>X86PlatformShim 1.0.0
>!AUpstreamUserClient 3.6.8
@kext.AMDFramebuffer 4.0.4
@kext.AMDRadeonX4000 4.0.4
@kext.AMDRadeonServiceManager 4.0.4
>!AGraphicsDevicePolicy 6.2.9
@AGDCPluginDisplayMetrics 6.2.9
>pmtelemetry 1
|IOUserEthernet 1.0.1
>usb.!UUserHCI 1
|IO!BSerialManager 8.0.4d18
@Dont_Steal_Mac_OS_X 7.0.0
>!AHV 1
>!ADiskImages2 1
>!AHDA 283.15
>!A!IKBLGraphics 16.0.2
>!ASMCLMU 212
>!A!ISlowAdaptiveClocking 4.0.0
>!A!ICFLGraphicsFramebuffer 16.0.2
@kext.AMD9500!C 4.0.4
>!AMCCSControl 1.14
>!AGFXHDA 100.1.433
>!A!IPCHPMC 2.0.1
>eficheck 1
>!AThunderboltIP 4.0.3
|SCSITaskUserClient 436.100.4
>!UODD 511.101.1
>BCMWLANFirmware4378.Hashstore 1
>BCMWLANFirmware4377.Hashstore 1
>BCMWLANFirmware4364.Hashstore 1
>BCMWLANFirmware4355.Hashstore 1
>!AFileSystemDriver 3.0.1
@filesystems.tmpfs 1
@filesystems.hfs.kext 556.100.11
@BootCache 40
@!AFSCompression.!AFSCompressionTypeZlib 1.0.0
@!AFSCompression.!AFSCompressionTypeDataless 1.0.0d1
>!ASDXC 1.9.0
|!ABCM5701Ethernet 11.0.0
>!ABCMWLANBusInterfacePCIeMac 1
@filesystems.apfs 1677.100.114
>!AAHCIPort 346.100.2
@private.KextAudit 1.0
>!AACPIButtons 6.1
>!ARTC 2.0
>!ASMBIOS 2.1
>!AACPIEC 6.1
>!AAPIC 1.7
@!ASystemPolicy 2.0.0
@nke.applicationfirewall 311
|IOKitRegistryCompatibility 1
|EndpointSecurity 1
>usb.cdc.acm 5.0.0
>usb.serial 6.0.0
>!UAudio 405.39
>usb.cdc.ecm 5.0.0
>usb.cdc.ncm 5.0.0
>!UMergeNub 900.4.2
@kext.triggers 1.0
>!AHIDKeyboard 224
>!AMultitouchDriver 4440.3
>!AInputDeviceSupport 4400.35
>!AHS!BDriver 4040.11
>IO!BHIDDriver 8.0.4d18
@kext.AMDRadeonX4400HWLibs 1.0
@kext.AMDRadeonX4000HWServices 4.0.4
>!AGraphicsControl 6.2.9
>usb.IOUSBHostHIDDevice 1.2
|IOAVB!F 940.4
|IOEthernetAVB!C 1.1.0
>DspFuncLib 283.15
@kext.OSvKernDSPLib 529
@!AGPUWrangler 6.2.9
|IOSlowAdaptiveClocking!F 1.0.0
|IOAccelerator!F2 442.9
@kext.AMDSupport 4.0.4
@!AGraphicsDeviceControl 6.2.9
>!AHDA!C 283.15
|IOHDA!F 283.15
|IONDRVSupport 585.1
|IOGraphics!F 585.1
|IOAudio!F 300.6.1
@vecLib.kext 1.2.0
@plugin.IOgPTPPlugin 980.4
>X86PlatformPlugin 1.0.0
|IO!BHost!CUARTTransport 8.0.4d18
|IO!BHost!CTransport 8.0.4d18
>IOPlatformPlugin!F 6.0.0d8
>!ASMBus!C 1.0.18d1
>!A!ILpssUARTv1 3.0.60
>!A!ILpssUARTCommon 3.0.60
>!AOnboardSerial 1.0
>!ASMBusPCI 1.0.14d1
>!AThunderboltDPOutAdapter 8.1.4
|IOSCSIMultimediaCommandsDevice 436.100.4
|IOBD!S!F 1.8
|IODVD!S!F 1.8
|IOCD!S!F 1.8
>usb.cdc 5.0.0
>usb.networking 5.0.0
>usb.!UHostCompositeDevice 1.2
>!AThunderboltPCIDownAdapter 4.1.1
>!AThunderboltDPInAdapter 8.1.4
>!AThunderboltDPAdapter!F 8.1.4
>!AHPM 3.4.4
>!A!ILpssI2C!C 3.0.60
>!A!ILpssI2C 3.0.60
>!A!ILpssDmac 3.0.60
>!ABSDKextStarter 3
|IOSurface 290.7
@filesystems.hfs.encodings.kext 1
>!AThunderboltNHI 7.2.8
|IOThunderbolt!F 9.3.2
>!ABCMWLANCoreMac 1.0.0
|IOSerial!F 11
|IO80211!FV2 1200.12.2b1
|IOSkywalk!F 1
>mDNSOffloadUserClient 1.0.1b8
>IOImageLoader 1.0.0
>corecapture 1.0.4
>!AXsanScheme 3
|IONVMe!F 2.1.0
>usb.!UXHCIPCI 1.2
>usb.!UXHCI 1.2
|IOAHCI!F 294.100.1
>usb.!UHostPacketFilter 1.0
|IOUSB!F 900.4.2
>!AEFINVRAM 2.1
>!AEFIRuntime 2.1
>!ASMCRTC 1.0
|IOSMBus!F 1.1
|IOHID!F 2.0.0
$!AImage4 3.0.0
|IOTimeSync!F 980.4
|IONetworking!F 3.4
>DiskImages 493.0.0
|IO!B!F 8.0.4d18
|IOReport!F 47
|IO!BPacketLogger 8.0.4d18
$quarantine 4
$sandbox 300.0
@kext.!AMatch 1.0.0d1
|CoreAnalytics!F 1
>!ASSE 1.0
>!AKeyStore 2
>!UTDM 511.101.1
|IOUSBMass!SDriver 184.101.1
|IOSCSIBlockCommandsDevice 436.100.4
|IO!S!F 2.1
|IOSCSIArchitectureModel!F 436.100.4
>!AMobileFileIntegrity 1.0.5
@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.corecrypto 11.1
@kec.Libm 1

 

[4sallypat]

Sounds like the internal hard drive is failing.

Can you do a diagnostic to confirm ?

1. On your Mac, choose Apple menu
   
   > Restart, then press and hold the D key while your Mac restarts. Keep holding the D key until the screen listing different languages appears.
2. Select a language. Apple Diagnostics starts automatically.
   When Apple Diagnostics is finished, it lists any problems it finds. (The reference code is for use by Apple Support.)

 

[create90mph]

Sounds like the internal hard drive is failing.

Can you do a diagnostic to confirm ?

1. On your Mac, choose Apple menu
   
   > Restart, then press and hold the D key while your Mac restarts. Keep holding the D key until the screen listing different languages appears.
2. Select a language. Apple Diagnostics starts automatically.
   When Apple Diagnostics is finished, it lists any problems it finds. (The reference code is for use by Apple Support.)

Just ran Apple Diagnostics. - No issues found.

 

[4sallypat]

Can you get to Disk Utility after Cmd - R during boot up ?

 

[create90mph]

Can you get to Disk Utility after Cmd - R during boot up ?

I can, and ran Disk Utility... no issues found there as well. - Have not had a repeat of the issue so far since reseting the NVRAM (but still concerned, since it happened twice)

 

[4sallypat]

I can, and ran Disk Utility... no issues found there as well. - Have not had a repeat of the issue so far since reseting the NVRAM (but still concerned, since it happened twice)

Good to hear.

I have a 2019 iMac as well but it is the base model with 1TB spinning HDD which I despise so I am using an external booting Bug Sur SSD (Thunderbolt) and it runs so much faster!

 

[Fishrrman]

OP:

Is the iMac a 27"?
If so, have you added RAM?

What peripherals do you have attached?

 

[create90mph]

OP:

Is the iMac a 27"?
If so, have you added RAM?

What peripherals do you have attached?

It’s a 27” inch - I added an additional 32gb of ram on my own when I first bought the Mac in 2019.

Connect peripherals include:
- Apple SuperDrive (USB)
- external HD for time machine and xtra storage (USB-C)
- external speakers (optical)

 

[create90mph]

I'm starting to wonder if something else is going on... I've also had a couple of unexpected restarts that have occurred while the Mac is asleep - It happened overnight. And this is the error I got. Any ideas?

panic(cpu 0 caller 0xffffff80162a182e): initproc exited -- exit reason namespace 2 subcode 0xb description: none

uuid info:
0x11bb29000 uuid = <7eaa668b-f906-3baa-a980-139bbe6e8766>
0x10f046000 uuid = <c8591ce5-68b0-3725-866c-0855e87c75d0>

Thread 2 crashed

RAX: 0x00007f8993505850, RBX: 0x0000000000000183, RCX: 0x00007f8993505850, RDX: 0x00000000e0000000
RSP: 0x0000700004186e30, RBP: 0x0000700004186e50, RSI: 0x0000000000000183, RDI: 0xe7007fff80711b70
R8: 0x0000000000597b29, R9: 0x0000000000000183, R10: 0x0000000000000800, R11: 0x0000000000003fff
R12: 0x0000000000000000, R13: 0x00007f89838199b8, R14: 0x0000000000000183, R15: 0x00007f8993505850
RFL: 0x0000000000010206, RIP: 0x00007fff2025713b, CS: 0x000000000000002b, SS: 0x0000000000000023

Thread 0: 0xffffff86d4ce99c8
0x00007fff203bfb22
0x00007fff2025649d
0x0000000000000000

Thread 1: 0xffffff86d6d47c28
0x00007fff203eb484

Thread 2: 0xffffff86d7669c28
0x00007fff2025713b
0x000000010f05b5aa
0x000000010f076147
0x000000010f07f131
0x000000010f07f4de
0x000000010f07f3ba
0x00007fff20245886
0x00007fff2025caa0
0x00007fff2024b473
0x00007fff2025d5e2
0x00007fff2024b473
0x00007fff2024c08d
0x00007fff20255bed
0x00007fff203ec4c0
0x00007fff203eb493
0x0000000000000000


Mac OS version:
20E241

Kernel version:
Darwin Kernel Version 20.4.0: Thu Apr 22 21:46:47 PDT 2021; root:xnu-7195.101.2~1/RELEASE_X86_64
Kernel UUID: 068F99A3-1DB3-31C0-87D5-09942F122BB6
System model name: iMac19,1 (Mac-AA95B1DDAB278B95)
System shutdown begun: NO
Panic diags file available: YES (0x0)