• Hold down the Command (⌘)+ S buttons whilst turning on the machine, the system will then boot into Single User Mode
  • at the prompt type: 
    /sbin/fsck -fy
  • at the prompt type: 
    /sbin/mount -uw /
  • at the prompt type: 
    launchctl load /System/Library/LaunchDaemons/com.apple.opendirectoryd.plist
  • at the prompt type: 
    passwd root
    • you will be prompted to enter a password twice
  • at the prompt type: 
    reboot
  • The Mac will now restart and take you to the logon screen, log into the Mac as the root user and use the password set in the step above.
  • An additional step you can take to confirm the root user has been logged in is checking the Users & Groups in Systems Preferences, the logged on user should state System Administrator