Works for Intel / EFI as well. Setting a boot password will lock out boot media / FireWire DMA. You can set it from your install media's Utilities menu (or wh

Works for Intel / EFI as well. Setting a boot password will lock out boot media / FireWire DMA. You can set it from your install media's Utilities menu (or while booted into Lion Recovery Partition). Fun fact: All of the Open Firmware / PPC Macs and most of the Intel Macs (with the exception of most every 2010+ model) could reset or blank the password by changing the RAM configuration. The newest Intel Macs, however, won't do this. You have to take the Mac to a service center where they generate a special binary (using an internal tool) that's specific to the machine(s) they need to unlock and place it on USB media, during boot, to trigger an unlock override. In short: Got a new new Mac? Don't set a password and forget it, write it down!