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Unattended Kernel panics on Catalina

Eminent Member
Joined: 5 years ago
Posts: 23
Topic starter  

I have an iMac still running Catalina. I keep getting unattended kernel panic reboots with this at the head of crash report:

panic(cpu 3 caller 0xffffff7f8e7f9ad5): userspace watchdog timeout: no successful checkins from in 120 seconds
service returned not alive with context : unresponsive dispatch queue(s):,
service:, total successful checkins since wake (5180 seconds ago): 507, last successful checkin: 120 seconds ago
service:, total successful checkins since wake (5180 seconds ago): 519, last successful checkin: 0 seconds ago

Kernel Extensions in backtrace:[B6A95892-6C75-3CF5-A6CC-6D83F30FA1D5]@0xffffff7f8e7f8000->0xffffff7f8e800fff

BSD process name corresponding to current thread: watchdogd

Any ideas?

Graham McKay
Reputable Member
Joined: 6 years ago
Posts: 358

This Stack Exchange thread looks similar.

So I’d suggest booting in to Safe Mode before leaving your Mac alone for a while to see if the absence of 3rd party background processes causes the panics to cease. If that turns out to be the case then you’d want start doing isolation/deactivation testing of any 3rd party tools.