How can I delete an user if I can't do it on System Preference/Users and Groups
I want to remove a couple of users from my old MacBook Pro.
I tried using the standard procedure (System Preferences/Users and Groups ==> unlock ==> select the user to be deleted ==> press minus button), but it doesn't work. The "minus" button changes it's color to grey from white, but then nothing else happens...
The users I want to delete are not in use when I try to delete.
One user had got administrator privileges, the other one didn't.
The Mac Book is currently running Mac OS High Sierra (V. 10.13.6).
Can anybody help me, please?
Thanks.
Riccardo