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Reply to Random Shutdown in Big Sur (ThunderboltNHI) driver problem
DON'T FORGET to create another system snapshot to take these modifications under account at next reboot : bless --folder /Volumes/[MacOS your custom stuff here]/System/Library/CoreServices --bootefi --create-snapshot I followed the instructions by sf98723 on Catalina while trying to update from 10.15.4 to 10.15.7 but when I try this part: bless --folder /Volumes/[MacOS your custom stuff here]/System/Library/CoreServices --bootefi --create-snapshot ... it doesn't work. it works if I leave off "--create-snapshot" but then when I finished the process my system had reverted to 10.15.4 without the update. So my question is can someone give more detail about the part where you create a snapshot, and why might --create-snapshot not work? It said something about not a valid command.
Apr ’21
Reply to Random Shutdown in Big Sur (ThunderboltNHI) driver problem
@dstnrgrs That is true, the rebuild and snapshot were not necessary in Catalina, as I figured out. Just today I finally decided to try Big Sur, and if I do the "bless" step, I am having the "restart" problem also. But if I don't, the change doesn't "stick." Everytime I have gotten to the point where it is just restarting with the error, I have done a reinstall from Recovery Mode because I didn't know what else to do. Is it really just as simple as doing another Recovery Mode and authenticated-root disable? Did the AppleThunderboltNHI.kext file restore itself on your system?
Apr ’21