How to Disable a Firmware Password in OS X 10.6
Firmware is a combination of software and hardware that stores permanent instructions for your computer. It tells the computer what to do upon startup. You can password-protect firmware on your Mac computer running OS X 10.6 (named Snow Leopard) to prevent users from tampering with any settings. However, if you need to remove this password, you can by accessing the Terminal utility, the Mac's command line interface.
Things You'll Need
- Snow Leopard installation disc
Insert the Snow Leopard installation disc into your Mac's CD/DVD drive. Wait for a window to appear.
Open a Terminal window. Click "Go" in the menu bar at the top of the screen. Click the "Utilities" option in the resulting menu. Scroll to and click "Terminal." Or, you can click the Spotlight magnifying glass icon on the right side of the menu, type "terminal" (without quotes) and press "Return."
Type the following command in the Terminal window and press "Return:"open /Volumes/Mac\ OS\ X\ Install\ DVD/Applications
Click "Utilities," then "Firmware Password Utility" in the Finder window that appears. Enter your administrative password if prompted.
Un-check the "Require password to start this computer from another source" check-box and click "OK." This disables the firmware password.