MacOS Big Sur 11.2.1 se reinicia y aparece: panic(cpu 1 caller 0xffffff801b564a25)

Ya cuando se reinicia y checas el reporte, aparece esto:

panic(cpu 1 caller 0xffffff801b564a25): userspace watchdog timeout: no successful checkins from com.apple.logd in 120 seconds

service returned not alive with context : unresponsive dispatch queue(s): com.apple.firehose.io-wl

service: com.apple.logd, total successful checkins since load (28950 seconds ago): 2884, last successful checkin: 120 seconds ago

service: com.apple.WindowServer, total successful checkins since load (28920 seconds ago): 2890, last successful checkin: 20 seconds ago

Después aparecen muchos muchos renglones con diferentes cosas

Kernel Extensions in backtrace:

com.apple.driver.watchdog(1.0)[2C1307C5-FD71-3802-8D68-A67DB24BCB4A]@0xffffff801b563000->0xffffff801b564fff

Process name corresponding to current thread: watchdogd

Mac OS version:

20D74

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: 0x0000000018000000

KernelCache base: 0xffffff8018200000

Kernel slide: 0x0000000018010000

Kernel text base: 0xffffff8018210000

__HIB text base: 0xffffff8018100000

System model name: iMac19,2 (Mac-63001698E7A34814)

System shutdown begun: NO

Panic diags file available: YES (0x0)

Hibernation exit count: 0

System uptime in nanoseconds: 28960582042966

Last Sleep: absolute base_tsc base_nano

Uptime : 0x00001a56e9348951

Sleep : 0x0000000000000000 0x0000000000000000 0x0000000000000000

Wake : 0x0000000000000000 0x0000000442c25b34 0x0000000000000000

last started kext at 28740245341184: >usb.!UUserHCI 1 (addr 0xffffff7fb8b9e000, size 102400)

last stopped kext at 28897880035278: >usb.!UUserHCI 1 (addr 0xffffff7fb8b9e000, size 102400)

¿Alguien sabe de que se trata?