Firmware Password Utility

In this video I run through the basics of setting a Firmware Password on your Mac

You would do this to prevent unauthorised users from booting from an external device or drive, which prevents people from resetting local account passwords, and thus gaining access to your account

Also, this prevents access to Target Disk Mode, again, protecting the data on your drive

[youtube http://www.youtube.com/watch?v=P8q1E–cczc]