I am having an issue with my MacBook Pro. Whenever I export an update for my apps via Xcode or Transporter to the App Store, the whole computer freezes and then restarts (kernel panic). I have been experiencing this since 10.15.4 and I thought macOS 10.15.5 update would help but no luck. The computers behaves fine, until I try to upload a binary to the App Store (At least let's say that's the only know way for me to trigger the bug). I did a clean install today, wiping all my data, reinstalling a fresh copy of macOS 10.15.5 and Xcode from the App Store. But it always occurs after uploading for like 10 minutes. I am disgusted, as a developer, I have to use my wife's 2015 MacBook to upload my binaries, her computer has no issue. Am I the only one ? I would definitely hug that somebody who can help me fix it.
CRASH LOGS:
panic(cpu 2 caller 0xffffff7f985a1ad5): userspace watchdog timeout: remoted connection watchdog expired, no updates from remoted monitoring thread in 60 seconds, 423 checkins from thread since monitoring enabled 8500 seconds ago after wakeservice: com.apple.logd, total successful checkins since wake (8500 seconds ago): 850, last successful checkin: 10 seconds ago
service: com.apple.WindowServer, total successful checkins since wake (8500 seconds ago): 850, last successful checkin: 10 seconds ago
Backtrace (CPU 2), Frame : Return Address
0xffffff914a6db720 : 0xffffff8017b1f5cd
0xffffff914a6db770 : 0xffffff8017c58b05
0xffffff914a6db7b0 : 0xffffff8017c4a68e
0xffffff914a6db800 : 0xffffff8017ac5a40
0xffffff914a6db820 : 0xffffff8017b1ec97
0xffffff914a6db920 : 0xffffff8017b1f087
0xffffff914a6db970 : 0xffffff80182c2858
0xffffff914a6db9e0 : 0xffffff7f985a1ad5
0xffffff914a6db9f0 : 0xffffff7f985a17fa
0xffffff914a6dba10 : 0xffffff8018254aae
0xffffff914a6dba60 : 0xffffff7f985a0cfe
0xffffff914a6dbb60 : 0xffffff801825dcd3
0xffffff914a6dbca0 : 0xffffff8017c082b2
0xffffff914a6dbdb0 : 0xffffff8017b25328
0xffffff914a6dbe10 : 0xffffff8017afbcc5
0xffffff914a6dbe70 : 0xffffff8017b12aa2
0xffffff914a6dbf00 : 0xffffff8017c30d05
0xffffff914a6dbfa0 : 0xffffff8017ac6226
Kernel Extensions in backtrace:
com.apple.driver.watchdog(1.0)[B435C72B-B311-3C67-8AA1-1D5CE0FAD429]@0xffffff7f985a0000->0xffffff7f985a8fff
BSD process name corresponding to current thread: watchdogd
Boot args: chunklist-security-epoch=0 -chunklist-no-rev2-dev
Mac OS version:
19F96
Kernel version:
Darwin Kernel Version 19.5.0: Thu Apr 30 18:25:59 PDT 2020; root:xnu-6153.121.1~7/RELEASE_X86_64
Kernel UUID: 7B7F06EE-1B75-345E-B898-2FD4FEC20F0D
Kernel slide: 0x0000000017800000
Kernel text base: 0xffffff8017a00000
__HIB text base: 0xffffff8017900000
System model name: MacBookPro15,2 (Mac-827FB448E656EC26)
System shutdown begun: NO
System uptime in nanoseconds: 25648972761027
last loaded kext at 20989527404840: >usb.cdc.acm 5.0.0 (addr 0xffffff7f9bc1f000, size 32768)
last unloaded kext at 21273759140481: >!UMergeNub 900.4.2 (addr 0xffffff7f9b7a2000, size 12288)
loaded kexts:
@nke.rvi 2.0.0
>!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
>!A!IKBLGraphics 14.0.6
@Dont_Steal_Mac_OS_X 7.0.0
>BridgeAudioCommunication 6.70.7
>!ABacklight 180.3
>!AThunderboltIP 3.1.4
>!AAVEBridge 6.1
>!AMCCSControl 1.14
>!ABridgeAudio!C 6.70.7
>!AGFXHDA 100.1.428
>!ATopCaseHIDEventDriver 3430.1
>!AHIDALSService 1
>!A!ICFLGraphicsFramebuffer 14.0.6
>!A!ISlowAdaptiveClocking 4.0.0
>!A!IPCHPMC 2.0.1
@filesystems.autofs 3.0
@filesystems.apfs 1412.120.2
>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
@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
>usb.!UHub 1.2
>!AGraphicsControl 5.2.4
|IOAVB!F 850.1
>!ASSE 1.0
>!ABacklightExpert 1.1.0
@!AGPUWrangler 5.2.4
>X86PlatformPlugin 1.0.0
>!ASMBus!C 1.0.18d1
>!AActuatorDriver 3440.1
|IONDRVSupport 576.1
>!AHIDKeyboard 209
>!AHS!BDriver 3430.1
>IO!BHIDDriver 7.0.5f6
>!AMultitouchDriver 3440.1
>!AInputDeviceSupport 3440.8
|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
@!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
>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
>!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
|IOSurface 269.11
@filesystems.hfs.encodings.kext 1
|IOAudio!F 300.2
@vecLib.kext 1.2.0
>!AThunderboltNHI 5.8.6
|IOThunderbolt!F 7.6.1
>!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
|IOUSB!F 900.4.2
>!A!ILpssI2C 3.0.60
>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
Turns out my 2 months old struggle all came from the fact I had my iPhone connected to the Mac during submissions to App Store. Somebody read my logs on Apple Community and told me:
usb.cdc.acm appears to be something that interfaces with a USB cellular modems. Since it was the last loaded kext, that might have something to do with it
I unplugged the iPhone during Xcode upload, and it worked fine, so I managed to share my solution with you. Obviously there is a conflict with the iPhone cellular sharing, even though both devices were on Wifi.
Cheers