This tip saved my ass when I broken the privileges of Mac OS X by accident, while changing the file sharing settings:
- Turn on your Macbook.
- Press and hold the [Apple] and "S" keys when you hear a chime sound.
- Release the keys when you see computer code on a black and white screen.
- Type at the prompt: /sbin/mount -uw /
- Press the [Enter] key.
- Type next: rm /var/db/.applesetupdone(rebuild user setups) or chmod (rebuild the user privilege)
- Press the [Enter] key.
- Restart. Your Macbook will restart and you can create a new user and password by going through the installation wizard or reborn .
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