I accidentally deleted all Administrator accounts on my MACBook Air. Now there are only two standard accounts left. I'm trying to change the settings to become an admn again but they keep asking me the Administrator Name and Password. I don't think this administrator exists anymore, and If it does, I have no idea who he is.
MacBook Air, OS X Yosemite (10.10.2), null
Can anyone help me with that , please?!
Can anyone help me with that , please?!
How to Create a New User Account if You Cannot Access Your Admin Account
Reboot the computer. At the chime press and hold down the COMMAND-S keys to start into Single-user Mode.
You will boot to a black screen with scrolling white text, release the keys and wait for it finish.
Enter the following lines at the command prompt pressing RETURN after each:
mount -uw /
rm /var/db/.applesetupdone
reboot
After you reboot the computer you will be taken to the Setup Assistant. When you get to the point where you are asked to setup your new user account, create a new admin account. Be sure to name this user account something different than the admin user account that already exists on the system. When you finish the Setup Assistant, it will automatically log you into the new account.
You can transfer your files from the old account to the new one. See: Transferring files from one User Account to another. Once you have moved all your files into your new account, you can delete the old account using Accounts or Users & Groups preferences.
Perfect! Thank you so much... Now I have a new Admin Account/Password.
I wonder if instead of transferring the files to the new account, I could turn my Standard Account into an Admin Account too and delete the account created today. Do you think it would work?
Yes, you could do that as far as I'm aware. It's just a checkbox. You will need to log out of the new account and log into the old one afterwards. Then you can delete the new admin account you made and you're back to normal.
Hope this now solves your problem.
Problem solved! Thanks for all the help!
How to create a new administrator account from scratch
