I accidentally installed Big Sur 11.7.10 and had issues getting it to work, but here's what worked for me: -Reboot in rescue mode (reboot while "Cmd + R") -Type: csrutil disable -Type: csrutil authenticated-root disable -Reboot in rescue mode -Type: mount -uw /Volumes/[your custom stuff here] (mine was: mount -uw /Volumes/Macintosh\ HD) -delete (or rename, or move elsewhere) the AppleThunderboltNHI.kext directory. To delete, type: rm -rf AppleThunderboltNHI.kext -Not sur if necessary, but I also deleted caches. I had to delete every files manually since rm -rf /System/Library/Caches/* didn't do anything. To do so, go to the Caches folder using cd /Volumes/[your custom stuff here]//System/Library/Caches then type ls to list all files and delete them one by one with the rm command. -Type: kmutil install -u --force --volume-root /Volumes/[your custom stuff here] -Type: bless --folder /Volumes/[your custom stuff here]/System/Library/CoreServices --bootefi --create-snapshot -reboot (in rescue mode) -csrutil enable -Reboot Then I got stuck in the infinite reboot loop with the error message, so I booted into recovery mode, went into disk util and ran First Aid on my Macintosh HD volume. It fixed my boot problems, the kext is still not running and my computer doesn't crash anymore. I hope it helps!! PS: I also cleared my my SMC, PRAM and NVRAM just for good measure, but it's not necessary. You can clear SMC by shutting your mac off, holding option, control, shift and power button for 10 sec. For PRAM and NVRAM, just hold command, option, R and P while booting and release it after it reboots.