Serial Crashes - iMac 2017

[lambreff]

Hi, MacHelp Community!

Thank you for your superb service and continued support!

I have a 2017 iMac, which would sporadically crash. I keep it up-to-date using the latest MacOS (BigSur). I have also run disk utility's first aid from within the system. Since Sept. 2020, my iMac has been crashing frequently - once every few days, or a few times a day. I have already had to reinstall the MacOS (and my files), as well as run virus checks (Avira and Avast). I have also saved most of the reports generated by the computer upon crashing (with the latest one pasted below). Finally, I have run the disk utility using the MacOS Recovery instructions provided by Apple and the result is that there is no hardware problem/issues. So, having spent countless hours trying to have my computer working normally without crashes, I've decided to reach out to you and see if you might be able to figure out what the real issue is and how to solve it.

Thank you in advance for taking the time to help out!

Have a wonderful weekend!

Sincerely,
Matt
(a Mac fan since 1993)

The Latest Crash Report

panic(cpu 3 caller 0xffffff801436ea25): userspace watchdog timeout: no successful checkins from com.apple.logd in 120 seconds
service returned not alive with context : unresponsive dispatch queue(s): com.apple.firehose.io-wl
service: com.apple.logd, total successful checkins since volume unfreeze notification (78941 seconds ago): 7883, last successful checkin: 120 seconds ago
service: com.apple.WindowServer, total successful checkins since volume unfreeze notification (78941 seconds ago): 7895, last successful checkin: 0 seconds ago

Backtrace (CPU 3), Frame : Return Address
0xffffffa0c23e3670 : 0xffffff80110b9aed
0xffffffa0c23e36c0 : 0xffffff80111fc6e3
0xffffffa0c23e3700 : 0xffffff80111ecd1a
0xffffffa0c23e3750 : 0xffffff801105ea2f
0xffffffa0c23e3770 : 0xffffff80110b938d
0xffffffa0c23e3890 : 0xffffff80110b9678
0xffffffa0c23e3900 : 0xffffff80118be434
0xffffffa0c23e3970 : 0xffffff801436ea25
0xffffffa0c23e3980 : 0xffffff801436e678
0xffffffa0c23e39a0 : 0xffffff801184569e
0xffffffa0c23e39f0 : 0xffffff801436dab4
0xffffffa0c23e3b20 : 0xffffff801184f86b
0xffffffa0c23e3c80 : 0xffffff80111a7d81
0xffffffa0c23e3d90 : 0xffffff80110bf0e7
0xffffffa0c23e3e00 : 0xffffff8011095905
0xffffffa0c23e3e60 : 0xffffff80110ad012
0xffffffa0c23e3ef0 : 0xffffff80111d0ec3
0xffffffa0c23e3fa0 : 0xffffff801105f216
Kernel Extensions in backtrace:
com.apple.driver.watchdog(1.0)[7AE04EA4-D026-39A0-B2D5-5C9E4EE72967]@0xffffff801436d000->0xffffff801436efff

Process name corresponding to current thread: watchdogd

Mac OS version:
20C69

Kernel version:
Darwin Kernel Version 20.2.0: Wed Dec 2 20:39:59 PST 2020; root:xnu-7195.60.75~1/RELEASE_X86_64
Kernel UUID: 82E2050C-5936-3D24-AD3B-EC4EC5C09E11
KernelCache slide: 0x0000000010e00000
KernelCache base: 0xffffff8011000000
Kernel slide: 0x0000000010e10000
Kernel text base: 0xffffff8011010000
__HIB text base: 0xffffff8010f00000
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: 164821627575409
Last Sleep: absolute base_tsc base_nano
Uptime : 0x000095e786901ecf
Sleep : 0x000032a44bfd329a 0x000000009c795164 0x00003295220bcd4d
Wake : 0x000032a45075672e 0x000000009c3aad08 0x000032a44f566669
last started kext at 150016478199764: >usb.!UUserHCI 1 (addr 0xffffff7fb199d000, size 98304)
last stopped kext at 127805235975653: >usb.!UUserHCI 1 (addr 0xffffff7fb199d000, size 98304)
loaded kexts:
>usb.!UUserHCI 1
>!ATopCaseHIDEventDriver 4020.6
>AudioAUUC 1.70
>AGPM 119
>!APlatformEnabler 2.7.0d0
>X86PlatformShim 1.0.0
>!AUpstreamUserClient 3.6.8
@fileutil 20.036.15
@kext.AMDFramebuffer 4.0.2
@filesystems.autofs 3.0
@kext.AMDRadeonX4000 4.0.2
>!A!IKBLGraphics 16.0.1
@kext.AMDRadeonServiceManager 4.0.2
>!AHDA 283.15
>!A!IPCHPMC 2.0.1
>!A!IKBLGraphicsFramebuffer 16.0.1
@kext.AMD9500!C 4.0.2
>!AGraphicsDevicePolicy 6.2.2
@AGDCPluginDisplayMetrics 6.2.2
>eficheck 1
>pmtelemetry 1
>LuaHardwareAccess 1.0.16
|IOUserEthernet 1.0.1
|IO!BSerialManager 8.0.2f9
@Dont_Steal_Mac_OS_X 7.0.0
>!AHV 1
|Broadcom!B20703USBTransport 8.0.2f9
>!ASMCLMU 212
>!AGFXHDA 100.1.431
>!ADiskImages2 1
>!AThunderboltIP 4.0.3
>!A!ISlowAdaptiveClocking 4.0.0
>!AMCCSControl 1.14
@filesystems.tmpfs 1
@filesystems.hfs.kext 556.60.1
@BootCache 40
@!AFSCompression.!AFSCompressionTypeZlib 1.0.0
@!AFSCompression.!AFSCompressionTypeDataless 1.0.0d1
@filesystems.apfs 1677.60.23
>!ASDXC 1.9.0
|!ABCM5701Ethernet 11.0.0
>AirPort.BrcmNIC 1400.1.1
>!AAHCIPort 346
@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 310
|IOKitRegistryCompatibility 1
|EndpointSecurity 1
>!AHIDKeyboard 222
>!AMultitouchDriver 4400.28
>!AInputDeviceSupport 4400.35
>!AHS!BDriver 4020.6
>IO!BHIDDriver 8.0.2f9
@kext.triggers 1.0
@kext.AMDRadeonX4200HWLibs 1.0
@kext.AMDRadeonX4000HWServices 4.0.2
>DspFuncLib 283.15
@kext.OSvKernDSPLib 529
|IOAccelerator!F2 439.52
@kext.AMDSupport 4.0.2
>X86PlatformPlugin 1.0.0
>IOPlatformPlugin!F 6.0.0d8
>!AGraphicsControl 6.2.2
>!ASMBusPCI 1.0.14d1
|IOSerial!F 11
|IOAVB!F 900.12
@plugin.IOgPTPPlugin 900.11
|IOEthernetAVB!C 1.1.0
|Broadcom!BHost!CUSBTransport 8.0.2f9
|IO!BHost!CUSBTransport 8.0.2f9
|IO!BHost!CTransport 8.0.2f9
>!AHDA!C 283.15
|IOHDA!F 283.15
|IONDRVSupport 585
|IOAudio!F 300.6.1
@vecLib.kext 1.2.0
@!AGPUWrangler 6.2.2
@!AGraphicsDeviceControl 6.2.2
|IOSlowAdaptiveClocking!F 1.0.0
|IOGraphics!F 585
>!ASMBus!C 1.0.18d1
>usb.networking 5.0.0
>usb.!UHostCompositeDevice 1.2
>!AThunderboltDPInAdapter 8.1.4
>!AThunderboltDPAdapter!F 8.1.4
>!AThunderboltPCIDownAdapter 4.1.1
>!AHPM 3.4.4
>!A!ILpssI2C!C 3.0.60
>!A!ILpssI2C 3.0.60
>!A!ILpssDmac 3.0.60
>!ABSDKextStarter 3
|IOSurface 289.3
@filesystems.hfs.encodings.kext 1
|IOAHCIBlock!S 332
|IO80211!F 1200.12.2b1
|IOSkywalk!F 1
>mDNSOffloadUserClient 1.0.1b8
>corecapture 1.0.4
|IOAHCI!F 294
|IONVMe!F 2.1.0
>!AThunderboltNHI 7.2.8
|IOThunderbolt!F 9.3.2
>usb.!UXHCIPCI 1.2
>usb.!UXHCI 1.2
|IOUSB!F 900.4.2
>!AEFINVRAM 2.1
>!AEFIRuntime 2.1
|IOSMBus!F 1.1
|IOHID!F 2.0.0
$!AImage4 3.0.0
|IOTimeSync!F 900.11
|IONetworking!F 3.4
>DiskImages 493.0.0
|IO!B!F 8.0.2f9
|IOReport!F 47
|IO!BPacketLogger 8.0.2f9
$quarantine 4
$sandbox 300.0
@kext.!AMatch 1.0.0d1
|CoreAnalytics!F 1
>!ASSE 1.0
>!AKeyStore 2
>!UTDM 511.60.2
|IOUSBMass!SDriver 184.40.6
|IOSCSIBlockCommandsDevice 436.40.6
|IO!S!F 2.1
|IOSCSIArchitectureModel!F 436.40.6
>!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

 

[Cory Cooper]

Hello and welcome.

At first glance, I would look at Avira and Avast, as they may not be compatible with Big Sur, or need an update/upgrade. Personally, I don't recommend running antivirus software, especially multiple applications, as it really isn't needed for macOS. If you do, it is best to disable any real-time/background scanning, as that has been known to cause slowness and crashing. Malware is the only real issue that Mac uses experience on occasion.

Try disabling the real-time scanning, or fully uninstall them temporarily to see if that resolves the issue.

C

 

[lambreff]

Hello and welcome.

At first glance, I would look at Avira and Avast, as they may not be compatible with Big Sur, or need an update/upgrade. Personally, I don't recommend running antivirus software, especially multiple applications, as it really isn't needed for macOS. If you do, it is best to disable any real-time/background scanning, as that has been known to cause slowness and crashing. Malware is the only real issue that Mac uses experience on occasion.

Try disabling the real-time scanning, or fully uninstall them temporarily to see if that resolves the issue.

C

Thank you for your guidance!

I had similar observations before and had not used any anti-virus software for more than 10 years. Nevertheless, the issue with the sporadic crashes appeared prior to installing the anti-virus apps. (Please note that I had downloaded the latest anti-virus applications directly from the developer.) Consequently, I have also removed them after your post and the crashing continued. Then, I installed Bitdefender, which also identified viruses and deleted them.

At this point, the crashing would continue occurring sporadically, though I have already upgraded to the latest OS, e.g. 11.2.3. The last couple of times, it happened after finishing running the disk utility - and then selecting shut down. The computer would initiate shut down and then restart with a crash and I'd get the following report (enclosed below).

panic(cpu 1 caller 0xffffff8003ebfbe6): initproc exited -- exit reason namespace 2 subcode 0x4 description: none

uuid info:
0x10fa07000 uuid = <0d4ea85f-7e30-338b-9215-314a5a5539b6>
0x1002c2000 uuid = <7426871f-66d2-3ee3-9d3c-26d02cdfa336>

Thread 5 crashed

RAX: 0x00007fff20408c2a, RBX: 0x00007000003c39b0, RCX: 0x00007fff2042098d, RDX: 0x0000000000000002
RSP: 0x00007000003c3998, RBP: 0x00007000003c39a0, RSI: 0x0000000000000390, RDI: 0x00007fb339d0cfc0
R8: 0x00000000004f4005, R9: 0x0000000000000001, R10: 0x0000000000000000, R11: 0xfffffffffffffe30
R12: 0x00007fb339d05f50, R13: 0x0000000000000001, R14: 0x0000000000000001, R15: 0x00007000003c3aa0
RFL: 0x0000000000010207, RIP: 0x00007fff2041a347, CS: 0x000000000000002b, SS: 0x0000000000000023

Thread 0: 0xffffff86b20d36c0
0x00007fff20566622
0x00007fff203fb51b
0x0000000000000000

Thread 1: 0xffffff86b4782bf0
0x00007fff20583a7a
0x00007fff203ea7c7
0x00007fff203f05fe
0x00007fff203f10cb
0x00007fff203fac5d
0x00007fff20592499
0x00007fff20591467
0x0000000000000000

Thread 2: 0xffffff86ca9ea000
0x00007fff205665a2
0x00000001002cf0a6
0x00007fff203ea7c7
0x00007fff203f05fe
0x00007fff203f10cb
0x00007fff203fac5d
0x00007fff20592499
0x00007fff20591467
0x0000000000000000

Thread 3: 0xffffff86cd1319b0
0x00007fff20562586
0x00007fff204081fc
0x00007fff203f784c
0x00007fff203f74ac
0x00000001002f5e49
0x00000001002cf029
0x00000001002cee0e
0x00007fff203ea7c7
0x00007fff203f7605
0x00000001002ce527
0x00007fff203ea7c7
0x00007fff203ed195
0x00007fff203fd550
0x00007fff203f04a7
0x00007fff203f10cb
0x00007fff203fac5d
0x00007fff20592499
0x00007fff20591467
0x0000000000000000

Thread 4: 0xffffff86b5ff2000
0x00007fff205665a2
0x00007fff203ea7c7
0x00007fff203ed195
0x00007fff203fd550
0x00007fff203f9857
0x00007fff203f9fb8
0x00007fff20592453
0x00007fff20591467
0x0000000000000000

Thread 5: 0xffffff86b1f2d9b0
0x00007fff2041a347
0x00007fff20407404
0x00007fff203faae0
0x00007fff20592499
0x00007fff20591467
0x0000000000000000

Thread 6: 0xffffff86b20d0bf0
0x00007fff205643fe
0x00000001002f6305
0x00007fff203f71d5
0x00007fff203ea7c7
0x00007fff203f05fe
0x00007fff203f10cb
0x00007fff203fac5d
0x00007fff20592499
0x00007fff20591467
0x0000000000000000

Thread 7: 0xffffff86b20cd000
0x0000000000000000


Mac OS version:
20D91

Kernel version:
Darwin Kernel Version 20.3.0: Thu Jan 21 00:07:06 PST 2021; root:xnu-7195.81.3~1/RELEASE_X86_64
Kernel UUID: C86236B2-4976-3542-80CA-74A6B8B4BA03
System model name: iMac18,2 (Mac-77F17D7DA9285301)
System shutdown begun: YES
Panic diags file available: YES (0x0)