User status changed from Admin to Standard after macOS reinstallation on my iMac.

sam b. wrote:

AS suggested I quit Terminal and then also in between each Terminal Command entry you’ve suggested. ALL returned “No Such File Or Directory”. I thank you for your considered ideas but wonder if I should not just bite the bullet and restore from a Time Machine backup? Or do a Disk First Aid, first???

Unless you typed the first directory (Macintosh HD - Data) incorrectly, it should most definitely not return "No Such File or Directory." If you entered that incorrectly, none of the others would work.

You can enter

cd /Volumes/Mac

Hit Tab, It should fill out Macintosh HD and pause. Type a backslash (\), space, and Tab and it should fill out the full path to the Data volume.

Then type pri and hit Tab, then v and Tab and d and Tab

Then hit return and it should show that you are in that directory. If you enter:

pwd

It will show the full path, /Volumes/Macintosh HD - Data/private/var/db

With that all successful, try to remove .AppleSetupDone

rm .AppleSetupDone