Enable firmware password on osx: This post will show you how to enable the firmware password on osx
firmware passwords will protect your mac from:
booting from a cd or dvd
booting from the diagnostic utility on the install dvd
booting from the network
booting from a different target drive
booting in single user mode
starting in safe mode
Pages: 1 2
Would you know how to do this on Lion since there is no install disk?