Reset 10.5 Leopard & 10.6 Snow Leopard password
- At the chime (or grey screen if your chime is turned off), 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.
If you have the Mac OS 10.6 System Disk (comes on a DVD)
- Have your DVD installer ready.
- Insert the DVD to the tray
- Restart and press down the letter ‘C’. It will load the installer DVD
- On the first screen, select Installer > Reset Password
- Select your account and make up a new password.