Reset 10.5 Leopard, 10.6 Snow Leopard password & OS X Lion

  • Power on or restart your Mac.
  • Hold down Command+S on your keyboard to enter single-user mode.
  • This step is optional, but it’s a good idea because it checks the consistency of the hard disk before moving on. At the prompt, type fsck -fy and press Enter/Return. Wait for the checks to complete before going to the next step.
  • Type mount -uw / and press Enter.
  • Type launchctl load /System/Library/LaunchDaemons/com.apple.DirectoryServices.plist and press Enter.
  • Type ls /Users and press Enter. This lists all of the usernames on the computer – helpful if you don’t know or remember what these are.
  • Type dscl . -passwd /Users/username password and replace “username” with one of the users displayed in the previous step. Replace “password” with a new password of your choice. Press Enter.
  • Type reboot and press Enter.
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