How to Change the Root Password in OS X

Insert the OS X install disk into the drive. Double-click on the 'Install Mac OS' icon in the disk window and click on the 'Restart' icon. Alternatively, insert the Mac OS X install disk into the drive, select 'Restart' from the Apple menu and hold down the 'C' key until you hear the start-up chimes.
Select your preferred language when prompted.
Locate the 'Utilities' menu from the menu bar and choose 'Password Reset' from the Utilities menu if you are installing Mac OS X v10.6 or later. Alternatively, choose 'Reset Password' from the 'Utilities' menu if you are installing Mac OS X v10.5 or v10.4 or 'Reset Password' from the 'Installer' menu if you are installing Mac OS X v10.3.
Click to highlight the hard drive for which you will be changing the password.
Select 'System Administrator,' which is the root user account. Change the password, then click 'Quit' from the 'Installer' menu.
Restart your Mac.
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