panic(cpu 1 caller 0xffffff8022bf9a25): 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 load (500 seconds ago): 39, last successful checkin: 120 seconds ago service: com.apple.windowserver, total successful checkins since load (470 seconds ago): 36, last successful checkin: 110 seconds ago backtrace (cpu 1), frame : return address 0xffffffb0b2d3b670 : 0xffffff801f88e0dd 0xffffffb0b2d3b6c0 : 0xffffff801f9d4f33 0xffffffb0b2d3b700 : 0xffffff801f9c552a 0xffffffb0b2d3b750 : 0xffffff801f832a2f 0xffffffb0b2d3b770 : 0xffffff801f88d8fd 0xffffffb0b2d3b890 : 0xffffff801f88dbf3 0xffffffb0b2d3b900 : 0xffffff802009d884 0xffffffb0b2d3b970 : 0xffffff8022bf9a25 0xffffffb0b2d3b980 : 0xffffff8022bf9660 0xffffffb0b2d3b9a0 : 0xffffff802001e13e 0xffffffb0b2d3b9f0 : 0xffffff8022bf8a34 0xffffffb0b2d3bb20 : 0xffffff802002837b 0xffffffb0b2d3bc80 : 0xffffff801f980961 0xffffffb0b2d3bd90 : 0xffffff801f89375d 0xffffffb0b2d3be00 : 0xffffff801f869cf5 0xffffffb0b2d3be60 : 0xffffff801f881312 0xffffffb0b2d3bef0 : 0xffffff801f9a982d 0xffffffb0b2d3bfa0 : 0xffffff801f833216 kernel extensions in backtrace: com.apple.driver.watchdog(1.0)[c29afc04-7113-39aa-80df-00f4ddad0f46]@0xffffff8022bf7000->0xffffff8022bf9fff process name corresponding to current thread: watchdogd mac os version: 20f71 kernel version: darwin kernel version 20.5.0: sat may 8 05:10:33 pdt 2021; root:xnu-7195.121.3~9/release_x86_64 kernel uuid: 52a1e876-863e-38e3-ac80-09bbab13b752 kernelcache slide: 0x000000001f600000 kernelcache base: 0xffffff801f800000 kernel slide: 0x000000001f610000 kernel text base: 0xffffff801f810000 __hib text base: 0xffffff801f700000 system model name: imac18,3 (mac-be088af8c5eb4fa2) system shutdown begun: no panic diags file available: yes (0x0) hibernation exit count: 0 system uptime in nanoseconds: 506166673959 last sleep: absolute base_tsc base_nano uptime : 0x00000075d9e28482 sleep : 0x0000000000000000 0x0000000000000000 0x0000000000000000 wake : 0x0000000000000000 0x0000000f2c6d623e 0x0000000000000000 last started kext at 13665629248: >audioauuc 1.70 (addr 0xffffff7fba420000, size 12288) loaded kexts: >audioauuc 1.70 >!aplatformenabler 2.7.0d0 >agpm 122.1 >x86platformshim 1.0.0 @filesystems.autofs 3.0 @fileutil 20.036.15 >!aupstreamuserclient 3.6.8 @kext.amdframebuffer 4.0.5 >!ahdahardwareconfigdriver 283.15 @kext.amdradeonx4000 4.0.5 >!ahda 283.15 @kext.amdradeonservicemanager 4.0.5 >!asmclmu 212 >!a!ikblgraphics 16.0.4 >acpi_smc_platformplugin 1.0.0 >!agfxhda 100.1.433 >!a!ikblgraphicsframebuffer 16.0.4 >eficheck 1 >!a!ipchpmc 2.0.1 >!agraphicsdevicepolicy 6.3.3 @kext.amd9500!c 4.0.5 @agdcplugindisplaymetrics 6.3.3 >!athunderboltip 4.0.3 >pmtelemetry 1 |iouserethernet 1.0.1 >usb.!uuserhci 1 |io!bserialmanager 8.0.5d7 @dont_steal_mac_os_x 7.0.0 >!ahv 1 >!adiskimages2 1 >!afivrdriver 4.1.0 >agdcbacklightcontrol 6.3.3 >!a!islowadaptiveclocking 4.0.0 |broadcom!b20703usbtransport 8.0.5d7 >!abacklight 180.3 >!amccscontrol 1.14 >!atopcasehideventdriver 4050.1 >!utopcasedriver 4050.1 |io!busbdfu 8.0.5d7 >!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 @filesystems.apfs 1677.120.9 |!abcm5701ethernet 11.0.0 >!asdxc 1.9.0 >airport.brcmnic 1400.1.1 >!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 @kext.triggers 1.0 @kext.amdradeonx4200hwlibs 1.0 >dspfunclib 283.15 @kext.osvkerndsplib 529 >!uaudio 405.39 @kext.amdradeonx4000hwservices 4.0.5 >ioplatformpluginlegacy 1.0.0 >x86platformplugin 1.0.0 |ioaccelerator!f2 442.9 >!ahda!c 283.15 |iohda!f 283.15 |ioaudio!f 300.6.1 @veclib.kext 1.2.0 >ioplatformplugin!f 6.0.0d8 >!agraphicscontrol 6.3.3 @kext.amdsupport 4.0.5 >!asmbuspci 1.0.14d1 >!athunderboltedmsink 5.0.3 >!athunderboltdpoutadapter 8.1.4 |ioserial!f 11 |ioavb!f 940.4 |ioethernetavb!c 1.1.0 @!agpuwrangler 6.3.3 @!agraphicsdevicecontrol 6.3.3 |ioslowadaptiveclocking!f 1.0.0 @plugin.iogptpplugin 985.2 |broadcom!bhost!cusbtransport 8.0.5d7 |io!bhost!cusbtransport 8.0.5d7 |io!bhost!ctransport 8.0.5d7 >!abacklightexpert 1.1.0 |iondrvsupport 585.1 |iographics!f 585.1 >!asmbus!c 1.0.18d1 >!ahs!bdriver 4050.1 >io!bhiddriver 8.0.5d7 >!amultitouchdriver 4440.3 >!ainputdevicesupport 4400.35 >!ahidkeyboard 224 >usb.iousbhosthiddevice 1.2 >usb.cdc 5.0.0 >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!ilpssdmac 3.0.60 >!absdkextstarter 3 |iosurface 290.8.1 @filesystems.hfs.encodings.kext 1 >!axsanscheme 3 |ioahciblock!s 332 >!athunderboltnhi 7.2.8 |iothunderbolt!f 9.3.2 |ionvme!f 2.1.0 |io80211!f 1200.12.2b1 |ioskywalk!f 1 >mdnsoffloaduserclient 1.0.1b8 >corecapture 1.0.4 >!a!ilpssi2c 3.0.60 >!a!ilpssgspi 3.0.60 |ioahci!f 294.100.1 >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 $!aimage4 3.0.0 |iotimesync!f 985.2 |ionetworking!f 3.4 >diskimages 493.0.0 |io!b!f 8.0.5d7 |ioreport!f 47 |io!bpacketlogger 8.0.5d7 $quarantine 4 $sandbox 300.0 @kext.!amatch 1.0.0d1 |coreanalytics!f 1 >!asse 1.0 >!akeystore 2 >!utdm 511.120.2 |iousbmass!sdriver 184.121.1 |ioscsiblockcommandsdevice 436.121.1 |io!s!f 2.1 |ioscsiarchitecturemodel!f 436.121.1 >!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
My machine gets restarts even when I am working on it.. I tried reinstalling Big sur, still facing same problem
Run diagnostics depending on the age of this iMac 5K 2017, disconnect all connected external storage and test again, remove any add-on anti-malware or add-on anti-virus or add-on VPN apps or add-on cleaner apps and test again, reset both the NVRAM and SMC and boot into Safe Mode and test again, and failing all that then contact Apple Support or your preferred repair provider.
Diags: https://support.apple.com/en-us/HT202731
SMC and NVRAM: https://support.apple.com/en-us/HT201262 https://support.apple.com/en-us/HT201295
Safe Mode: https://support.apple.com/en-us/HT204063
Apple Support: https://getsupport.apple.com