Return User To Admin Users and Undo Parental Controls For a while, I had only one user, say, User1, on my Mac's High Sierra. Then there arose a need to have some parental controls. To do that I created a new user, say, User2 and made it an admin while User1 was the controlled one. 

At present, the need to control is no longer there and all of the information that I need to use is still under User1. My questions are the following.


How can I add User1 to sudo'ers?
Is there a way to get rid of User2 account and restore User1 to its original sole ownership?
How can I make sure all of the deleted user's info and storage is scrapped and freed?


Any help or advice is appreciated.
As User 2


Open Users &amp; Groups
Unlock it with Password
Disable (uncheck) parental controls for user 1
Enable User 1 as Admin


Log out from User 2, log in as User 1


Open Users &amp; Groups
Delete user 2 (you will be offered to save or not the user data)