Repairing Disk Permissions for internal drive.
hello,
I recently installed Big Sur on an internal SSD (2014 Mac Mini) and it is now startup disk. However, since then, I have not been able to save any files to the original Mac HD. It is now read only and running Disk Utility to try and repair the permissions fails. Also, each time I log into the machine another window pops up asking for a password of the old start up drive. However, it no longer takes the old password, only the one that I've set for the new drive. Also, any attempt to change the permissions from the sharing and permissions window gives me an error message stating that I "don't have the necessary permissions." I've thought about buying disk warrior, but I don't think that it supports Big Sur.
Thanks,
K