How do i know who is the administrator
I am unable to make any changes in system preferences. It is prompting me for a user name and password. I have keyed in for both but still unable to login
Try suggestions given in this article.
https://support.apple.com/en-us/HT203127
Right click System Preferences in the Dock and then "Users & Groups"
Resulting window will show details.
https://support.apple.com/guide/mac-help/set-up-other-users-on-your-mac-mtusr001/mac