Mac ~ reset password

1. Power on or restart your Mac (should work for any Mac OS X system).

2. At the chime (or grey screen if your chime is turned off), hold down Command+S on your keyboard to enter single-user mode.

3. 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.

4. Type mount -uw / and press Enter.

5. Type rm /var/db/.AppleSetupDone and press Enter.

6. Type shutdown -h now and press Enter.


然後重開機就會要你建立新的user.........

這是其中一個方法~~~跟mac說才剛安裝完XD


source
http://www.macyourself.com/2009/08/03/how-to-reset-your-mac-os-x-password-without-an-installer-disc/