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Password works for login but not for installs, changes etc

Hello everyone

I'm on a mid 2011 iMac running Sierra

My password works to login from waking up, but if asked for password to make changes or install an app it doesn't recognise it, very frustrating...any clues? cheers

Posted on Apr 12, 2020 3:50 AM

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Question marked as Top-ranking reply

Posted on Apr 12, 2020 6:05 PM

Ok, You can create a new administrator account by restarting the Setup Assistant:

  1. Boot into Single User Mode: Start/restart your Mac. As soon as you hear the startup tone, press and hold ⌘ + S until you see a black screen with white lettering. (If you end up back on the login screen after a flash of the black screen with white lettering, enter your password and it will return to the black screen.)
  2. Check and repair the drive by typing /sbin/fsck -fy then ↩ enter - as directed by the on-screen text.
  3. Mount the drive as read-write by typing /sbin/mount -uw / then ↩ enter.
  4. Remove the Apple Setup Done file by typing rm /var/db/.AppleSetupDone then ↩ enter.
  5. Reboot by typing reboot then ↩ enter.
  6. Complete the setup process, creating a new admin account.


Be very careful to notice the spaces in those Terminal Commands.


Once you've done that the computer reboots and it's like the first time you used the machine. Your old accounts are all safe. From there you just change all other account passwords in the account preferences!!

4 replies
Question marked as Top-ranking reply

Apr 12, 2020 6:05 PM in response to MRBKNZ

Ok, You can create a new administrator account by restarting the Setup Assistant:

  1. Boot into Single User Mode: Start/restart your Mac. As soon as you hear the startup tone, press and hold ⌘ + S until you see a black screen with white lettering. (If you end up back on the login screen after a flash of the black screen with white lettering, enter your password and it will return to the black screen.)
  2. Check and repair the drive by typing /sbin/fsck -fy then ↩ enter - as directed by the on-screen text.
  3. Mount the drive as read-write by typing /sbin/mount -uw / then ↩ enter.
  4. Remove the Apple Setup Done file by typing rm /var/db/.AppleSetupDone then ↩ enter.
  5. Reboot by typing reboot then ↩ enter.
  6. Complete the setup process, creating a new admin account.


Be very careful to notice the spaces in those Terminal Commands.


Once you've done that the computer reboots and it's like the first time you used the machine. Your old accounts are all safe. From there you just change all other account passwords in the account preferences!!

Password works for login but not for installs, changes etc

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