I am having the same problem since upgrading to big sur. The same issues as outlined above. I have no external hard drives or monitors attached. Adobe creative cloud and software is unusable at the moment with constant crashing - the computer will often just turn off completely. When I use photoshop every time I take an action the image interface flickers which I have never seen before in all my years of using it. The computer is shutting down when Im not using, it doesn't wake up when I touch the mouse, it has a slow start - up and on the login page the keyboard is slower, the mouse freezes for a minute or so and the little icon on the log in page has become pixelated. All of this since the upgrade and all issues started at the same time. Ive had some crash reports and Ive sent the reports but like others I don't always get a report to send. Please help apple Mac Spec is: iMac (Retina 5K, 27-inch, Late 2015) i5 this is the latest crash report I got a few minutes ago is panic(cpu 3 caller 0xffffff801a164a25): userspace watchdog timeout: no successful checkins from com.apple.WindowServer in 120 seconds service: com.apple.logd, total successful checkins since wake (1290 seconds ago): 130, last successful checkin: 0 seconds ago service: com.apple.WindowServer, total successful checkins since wake (1290 seconds ago): 118, last successful checkin: 120 seconds ago Backtrace (CPU 3), Frame : Return Address 0xffffffb099613670 : 0xffffff8016ebab4d  0xffffffb0996136c0 : 0xffffff8016ffd7e3  0xffffffb099613700 : 0xffffff8016fede1a  0xffffffb099613750 : 0xffffff8016e5fa2f  0xffffffb099613770 : 0xffffff8016eba3ed  0xffffffb099613890 : 0xffffff8016eba6d8  0xffffffb099613900 : 0xffffff80176bf004  0xffffffb099613970 : 0xffffff801a164a25  0xffffffb099613980 : 0xffffff801a164678  0xffffffb0996139a0 : 0xffffff801764628e  0xffffffb0996139f0 : 0xffffff801a163ab4  0xffffffb099613b20 : 0xffffff801765045b  0xffffffb099613c80 : 0xffffff8016fa8e51  0xffffffb099613d90 : 0xffffff8016ec0147  0xffffffb099613e00 : 0xffffff8016e96905  0xffffffb099613e60 : 0xffffff8016eae062  0xffffffb099613ef0 : 0xffffff8016fd1fc3  0xffffffb099613fa0 : 0xffffff8016e60216        Kernel Extensions in backtrace:          com.apple.driver.watchdog(1.0)[2C1307C5-FD71-3802-8D68-A67DB24BCB4A]@0xffffff801a163000-0xffffff801a164fff Process name corresponding to current thread: watchdogd Mac OS version: 20D80 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 KernelCache slide: 0x0000000016c00000 KernelCache base:  0xffffff8016e00000 Kernel slide:      0x0000000016c10000 Kernel text base:  0xffffff8016e10000 __HIB  text base: 0xffffff8016d00000 System model name: iMac17,1 (Mac-65CE76090165799A) System shutdown begun: NO Panic diags file available: YES (0x0) Hibernation exit count: 0 System uptime in nanoseconds: 9499664877805 Last Sleep:           absolute           base_tsc          base_nano   Uptime  : 0x000008a3d0268b6d   Sleep   : 0x00000775dc74bf09 0x00000000769c41b8 0x00000764a77d9a28   Wake    : 0x00000775e3fe843d 0x0000000076c4fba0 0x00000775e2f8265b last started kext at 9117326347000: !UAudio 401.4 (addr 0xffffff7fb7310000, size 307200) last stopped kext at 9177338381181: usb.cdc 5.0.0 (addr 0xffffff80185de000, size 8192) loaded kexts: !ATopCaseHIDEventDriver 4030.5 AudioAUUC 1.70 X86PlatformShim 1.0.0 AGPM 119 !APlatformEnabler 2.7.0d0 @fsplaceholder 1.14.0 @fileutil 20.036.15 !AUpstreamUserClient 3.6.8 @filesystems.autofs 3.0 @kext.AMDFramebuffer 4.0.2 !AMikeyHIDDriver 131 @kext.AMDRadeonX4000 4.0.2 !AMikeyDriver 283.15 @kext.AMDRadeonServiceManager 4.0.2 !AHDA 283.15 !AGraphicsDevicePolicy 6.2.2 !A!IPCHPMC 2.0.1 !AThunderboltIP 4.0.3 !A!ISKLGraphics 16.0.1 !ASMCLMU 212 @AGDCPluginDisplayMetrics 6.2.2 pmtelemetry 1 LuaHardwareAccess 1.0.16 |IOUserEthernet 1.0.1 |IO!BSerialManager 8.0.3d9 @Dont_Steal_Mac_OS_X 7.0.0 !AHV 1 !ADiskImages2 1 !A!ISlowAdaptiveClocking 4.0.0 !A!ISKLGraphicsFramebuffer 16.0.1 eficheck 1 @kext.AMD8000!C 4.0.2 |Broadcom!B20703USBTransport 8.0.3d9 !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 1677.81.1 !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 223 !AMultitouchDriver 4400.28 !AInputDeviceSupport 4400.35 !AHS!BDriver 4030.5 IO!BHIDDriver 8.0.3d9 @kext.triggers 1.0 @kext.AMDRadeonX4050HWLibs 1.0 @kext.AMDRadeonX4000HWServices 4.0.2 DspFuncLib 283.15 @kext.OSvKernDSPLib 529 !AGraphicsControl 6.2.2 !AThunderboltEDMSink 5.0.3 |IOSerial!F 11 |IOAVB!F 930.1 @plugin.IOgPTPPlugin 900.11 |IOEthernetAVB!C 1.1.0 @!AGPUWrangler 6.2.2 |IOSlowAdaptiveClocking!F 1.0.0 |IOAccelerator!F2 439.52 !ASMBusPCI 1.0.14d1 !AHDA!C 283.15 |IOHDA!F 283.15 |IOAudio!F 300.6.1 @vecLib.kext 1.2.0 @kext.AMDSupport 4.0.2 @!AGraphicsDeviceControl 6.2.2 |IONDRVSupport 585 |Broadcom!BHost!CUSBTransport 8.0.3d9 |IO!BHost!CUSBTransport 8.0.3d9 |IO!BHost!CTransport 8.0.3d9 X86PlatformPlugin 1.0.0 IOPlatformPlugin!F 6.0.0d8 |IOGraphics!F 585 !ASMBus!C 1.0.18d1 usb.networking 5.0.0 usb.!UHostCompositeDevice 1.2 !AThunderboltDPOutAdapter 8.1.4 !AThunderboltDPInAdapter 8.1.4 !AThunderboltDPAdapter!F 8.1.4 !AThunderboltPCIDownAdapter 4.1.1 !ABSDKextStarter 3 |IOSurface 289.3 @filesystems.hfs.encodings.kext 1 |IOAHCIBlock!S 332 !AThunderboltNHI 7.2.8 |IOThunderbolt!F 9.3.2 |IO80211!F 1200.12.2b1 |IOSkywalk!F 1 mDNSOffloadUserClient 1.0.1b8 corecapture 1.0.4 |IOUSB!F 900.4.2 |IOAHCI!F 294 usb.!UXHCIPCI 1.2 usb.!UXHCI 1.2 !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 8.0.3d9 |IOReport!F 47 |IO!BPacketLogger 8.0.3d9 $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