http://www.macobserver.com/article/2001/10/08.8.shtml Not for the faint of heart. Here's the caveat from MacObserver: The Mac Observer Spin: Did we mention that you should be extremely careful about using this kind of tool? Please do, be careful that is. There may well be a way for reversing an Open Firmware lock, but we don't know what it is. Turning your Mac into a useless, but beautiful, hunk of plastic in the name of security would be a terrible waste. g Brian Cook wrote: > does anybody have information about firmware locking on ibooks..?? > > "There's music playing, but we dance to the beat of our own black hearts"