Hey sf98723 - I just updated to Big Sur and have been following your guidance. I'm having trouble on step 5 when I attempt to mount MacOS (mine is called Macintosh HD). Typing: mount -uw /Volumes/Macintosh HD Resulted in: mount: unknown special file or file system /Volumes/Macintosh. I saw someone added a space between '-' and 'uw' so I tried that: mount - uw /Volumes/Macintosh HD Resulted in: usage: mount [-dfruvw] [-o options] [-t external_type] special mount_point mount [-adfruvw] [-t external_type] mount [-dfruvw] special | mount_point Am I doing something wrong here? Using Macbook Pro 15 Late 2013