same here: panic(cpu 2 caller 0xffffff801dd53a13): userspace watchdog timeout: no successful checkins from com.apple.WindowServer in 120 seconds service: com.apple.logd, total successful checkins since load (7130 seconds ago): 714, last successful checkin: 0 seconds ago service: com.apple.WindowServer, total successful checkins since load (7100 seconds ago): 698, last successful checkin: 120 seconds ago service: com.apple.remoted, total successful checkins since load (7130 seconds ago): 712, last successful checkin: 0 seconds ago Backtrace (CPU 2), Frame : Return Address 0xffffffc11bbeb670 : 0xffffff801aabc66d 0xffffffc11bbeb6c0 : 0xffffff801abff073 0xffffffc11bbeb700 : 0xffffff801abef6aa 0xffffffc11bbeb750 : 0xffffff801aa61a2f 0xffffffc11bbeb770 : 0xffffff801aabbf0d 0xffffffc11bbeb890 : 0xffffff801aabc1f8 0xffffffc11bbeb900 : 0xffffff801b2bee84 0xffffffc11bbeb970 : 0xffffff801dd53a13 0xffffffc11bbeb980 : 0xffffff801dd536ba 0xffffffc11bbeb9a0 : 0xffffff801b2460ee 0xffffffc11bbeb9f0 : 0xffffff801dd52b0a 0xffffffc11bbebb20 : 0xffffff801b2502bb 0xffffffc11bbebc80 : 0xffffff801abaaa61 0xffffffc11bbebd90 : 0xffffff801aac1d77 0xffffffc11bbebe00 : 0xffffff801aa985d5 0xffffffc11bbebe60 : 0xffffff801aaafb82 0xffffffc11bbebef0 : 0xffffff801abd3823 0xffffffc11bbebfa0 : 0xffffff801aa62216 Kernel Extensions in backtrace: com.apple.driver.watchdog(1.0)[7948A279-A8B8-3650-AFBF-B1E3EB68942A]@0xffffff801dd52000->0xffffff801dd53fff Process name corresponding to current thread: watchdogd Boot args: chunklist-security-epoch=0 -chunklist-no-rev2-dev Mac OS version: 20B50 Kernel version: Darwin Kernel Version 20.1.0: Sat Oct 31 00:07:11 PDT 2020; root:xnu-7195.50.7~2/RELEASEX8664 Kernel UUID: 84C6DC45-6B02-335F-9439-5D2A9BC385A4 KernelCache slide: 0x000000001a800000 KernelCache base: 0xffffff801aa00000 Kernel slide: 0x000000001a810000 Kernel text base: 0xffffff801aa10000 __HIB text base: 0xffffff801a900000 System model name: iMacPro1,1 (Mac-7BA5B2D9E42DDD94) System shutdown begun: NO Hibernation exit count: 0