After updating to big sur, I can no longer mount the root as writable (even with SIP disabled):
sudo mount -uw /
mount_apfs: volume could not be mounted: Permission denied
mount: / failed with 66
How can I fix this?
big surmacos
After updating to big sur, I can no longer mount the root as writable (even with SIP disabled):
sudo mount -uw /
mount_apfs: volume could not be mounted: Permission denied
mount: / failed with 66
How can I fix this?
Best Answer
DISCLAIMER: have a good backup and plan to erase and reinstall your Mac from the internet before trying this procedure. A mistake can prevent your system from starting without assistance.
mount
and chop off the last s, e.g. if your root is/dev/disk1s2s3
, you'll mount/dev/disk1s2
~/mount
sudo mount -o nobrowse -t apfs DISK_PATH MOUNT_PATH
, using the values from abovesudo bless --folder MOUNT_PATH/System/Library/CoreServices --bootefi --create-snapshot