I have a MB Pro w/Cat 10.15.5-keeps shutting down. It says "loading photos", goes black & restarts back to my sign in
panic(cpu 6 caller 0xffffff7f879a1ad5): userspace watchdog timeout: no successful checkins from com.apple.WindowServer in 120 seconds
service: com.apple.logd, total successful checkins since wake (3210 seconds ago): 322, last successful checkin: 0 seconds ago
service: com.apple.WindowServer, total successful checkins since wake (3210 seconds ago): 310, last successful checkin: 120 seconds ago
Backtrace (CPU 6), Frame : Return Address
0xffffff8205143720 : 0xffffff8006f1f5cd
0xffffff8205143770 : 0xffffff8007058b05
0xffffff82051437b0 : 0xffffff800704a68e
0xffffff8205143800 : 0xffffff8006ec5a40
0xffffff8205143820 : 0xffffff8006f1ec97
0xffffff8205143920 : 0xffffff8006f1f087
0xffffff8205143970 : 0xffffff80076c2838
0xffffff82051439e0 : 0xffffff7f879a1ad5
0xffffff82051439f0 : 0xffffff7f879a17fa
0xffffff8205143a10 : 0xffffff8007654a8e
0xffffff8205143a60 : 0xffffff7f879a0cfe
0xffffff8205143b60 : 0xffffff800765dcb3
0xffffff8205143ca0 : 0xffffff80070082b2
0xffffff8205143db0 : 0xffffff8006f25328
0xffffff8205143e10 : 0xffffff8006efbcc5
0xffffff8205143e70 : 0xffffff8006f12aa2
0xffffff8205143f00 : 0xffffff8007030d05
0xffffff8205143fa0 : 0xffffff8006ec6226
Kernel Extensions in backtrace:
com.apple.driver.watchdog(1.0)[B435C72B-B311-3C67-8AA1-1D5CE0FAD429]@0xffffff7f879a0000->0xffffff7f879a8fff
BSD process name corresponding to current thread: watchdogd
Boot args: chunklist-security-epoch=0 -chunklist-no-rev2-dev
Mac OS version:
19F101
Kernel version:
Darwin Kernel Version 19.5.0: Tue May 26 20:41:44 PDT 2020; root:xnu-6153.121.2~2/RELEASE_X86_64
Kernel UUID: 54F1A78D-6F41-32BD-BFED-4381F9F6E2EF
Kernel slide: 0x0000000006c00000
Kernel text base: 0xffffff8006e00000
__HIB text base: 0xffffff8006d00000
System model name: MacBookPro15,1 (Mac-937A206F2EE63C01)
System shutdown begun: NO
System uptime in nanoseconds: 8580969081105
last loaded kext at 8160909490405: >!UAudio 323.1 (addr 0xffffff7f8c5c6000, size 434176)
last unloaded kext at 5611413460247: >!UAudio 323.1 (addr 0xffffff7f8c5c6000, size 434176)
loaded kexts:
@kext.AMDFramebuffer 3.0.9
@kext.AMDRadeonX4000 3.0.9
@kext.AMDRadeonServiceManager 3.0.9
>!AGraphicsDevicePolicy 5.2.4
@fileutil 20.036.15
@AGDCPluginDisplayMetrics 5.2.4
>!AHV 1
|IOUserEthernet 1.0.1
|IO!BSerialManager 7.0.5f6
>AGPM 111.4.4
>!APlatformEnabler 2.7.0d0
>X86PlatformShim 1.0.0
>!AUpstreamUserClient 3.6.8
>pmtelemetry 1
>AGDCBacklightControl 5.2.4
>!A!IKBLGraphics 14.0.6
@Dont_Steal_Mac_OS_X 7.0.0
>BridgeAudioCommunication 6.70.7
@kext.AMD9500!C 3.0.9
>!AThunderboltIP 3.1.4
>!AAVEBridge 6.1
>!AMuxControl2 5.2.4
>!AMCCSControl 1.14
>!ATopCaseHIDEventDriver 3430.1
>!AHIDALSService 1
>!ABridgeAudio!C 6.70.7
>!AGFXHDA 100.1.428
>!A!ICFLGraphicsFramebuffer 14.0.6
>!A!ISlowAdaptiveClocking 4.0.0
>!A!IPCHPMC 2.0.1
@filesystems.autofs 3.0
>BCMWLANFirmware4355.Hashstore 1
>BCMWLANFirmware4364.Hashstore 1
>BCMWLANFirmware4377.Hashstore 1
@filesystems.hfs.kext 522.100.5
@BootCache 40
@!AFSCompression.!AFSCompressionTypeDataless 1.0.0d1
@!AFSCompression.!AFSCompressionTypeZlib 1.0.0
>!AVirtIO 1.0
>!ABCMWLANBusInterfacePCIe 1
@filesystems.apfs 1412.120.2
@private.KextAudit 1.0
>!ASmartBatteryManager 161.0.0
>!AACPIButtons 6.1
>!ASMBIOS 2.1
>!AACPIEC 6.1
>!AAPIC 1.7
$!AImage4 1
@nke.applicationfirewall 303
$TMSafetyNet 8
@!ASystemPolicy 2.0.0
|EndpointSecurity 1
>!UAudio 323.1
@kext.AMDRadeonX4100HWLibs 1.0
@kext.AMDRadeonX4000HWServices 3.0.9
|IOAVB!F 850.1
>!ASSE 1.0
>!ABacklightExpert 1.1.0
@!AGPUWrangler 5.2.4
>!AGraphicsControl 5.2.4
>X86PlatformPlugin 1.0.0
>!ASMBus!C 1.0.18d1
>!AHS!BDriver 3430.1
>IO!BHIDDriver 7.0.5f6
>!AHIDKeyboard 209
>!AActuatorDriver 3440.1
>!AMultitouchDriver 3440.1
>!AInputDeviceSupport 3440.8
|IONDRVSupport 576.1
|IO!BHost!CUARTTransport 7.0.5f6
|IO!BHost!CTransport 7.0.5f6
>!A!ILpssUARTv1 3.0.60
>!A!ILpssUARTCommon 3.0.60
>!AOnboardSerial 1.0
@kext.AMDSupport 3.0.9
@!AGraphicsDeviceControl 5.2.4
|IOAccelerator!F2 438.5.4
|IOGraphics!F 576.1
|IOSlowAdaptiveClocking!F 1.0.0
>IOPlatformPlugin!F 6.0.0d8
@plugin.IOgPTPPlugin 840.3
|IOEthernetAVB!C 1.1.0
@kext.triggers 1.0
>usb.cdc.ncm 5.0.0
>usb.cdc 5.0.0
>usb.networking 5.0.0
>usb.!UHostCompositeDevice 1.2
|IOSurface 269.11
@filesystems.hfs.encodings.kext 1
|IOAudio!F 300.2
@vecLib.kext 1.2.0
>!ABCMWLANCore 1.0.0
>mDNSOffloadUserClient 1.0.1b8
>IOImageLoader 1.0.0
|IOSerial!F 11
|IO80211!FV2 1200.12.2b1
>corecapture 1.0.4
|IOSkywalk!F 1
>!AThunderboltPCIDownAdapter 2.5.4
>!AThunderboltDPInAdapter 6.2.6
>!AThunderboltDPAdapter!F 6.2.6
>!AHPM 3.4.4
>!A!ILpssI2C!C 3.0.60
>!A!ILpssDmac 3.0.60
>!A!ILpssI2C 3.0.60
>!AThunderboltNHI 5.8.6
|IOThunderbolt!F 7.6.1
>usb.!UVHCIBCE 1.2
>usb.!UVHCI 1.2
>usb.!UVHCICommonBCE 1.0
>usb.!UVHCICommon 1.0
>!AEffaceableNOR 1.0
|IOBufferCopy!C 1.1.0
|IOBufferCopyEngine!F 1
|IONVMe!F 2.1.0
|IOUSB!F 900.4.2
>usb.!UXHCIPCI 1.2
>usb.!UXHCI 1.2
>!AEFINVRAM 2.1
>!AEFIRuntime 2.1
>!ASMCRTC 1.0
|IOSMBus!F 1.1
|IOHID!F 2.0.0
$quarantine 4
$sandbox 300.0
@kext.!AMatch 1.0.0d1
>!AKeyStore 2
>!UTDM 489.120.1
|IOSCSIBlockCommandsDevice 422.120.3
>!ACredentialManager 1.0
>KernelRelayHost 1
>!ASEPManager 1.0.1
>IOSlaveProcessor 1
>!AFDEKeyStore 28.30
>!AEffaceable!S 1.0
>!AMobileFileIntegrity 1.0.5
@kext.CoreTrust 1
|CoreAnalytics!F 1
|IOTimeSync!F 840.3
|IONetworking!F 3.4
>DiskImages 493.0.0
|IO!B!F 7.0.5f6
|IO!BPacketLogger 7.0.5f6
|IOUSBMass!SDriver 157.121.1
|IOSCSIArchitectureModel!F 422.120.3
|IO!S!F 2.1
|IOUSBHost!F 1.2
>usb.!UCommon 1.0
>!UHostMergeProperties 1.2
>!ABusPower!C 1.0
|IOReport!F 47
>!AACPIPlatform 6.1
>!ASMC 3.1.9
>watchdog 1
|IOPCI!F 2.9
|IOACPI!F 1.4
@kec.pthread 1
@kec.corecrypto 1.0
@kec.Libm 1
I’ve encountered the same issue repeatedly and found a long thread on MacRumors with users sharing similar errors for the past few months. The most recent comments yesterday on page 19 report that Apple has a “Potential fix identified - For a future OS update”.