Hi You dont need a specific firmware or drive to burn in OSX. You used to in early versions of OSX, but havent come across it is Tiger and upwards. You also used to have troubles booting from a non-Apple drive but even that is pretty obsolete these days. Simon -- http://twitter.com/SimonRoyal - http://www.tinyurl.com/macspectrum (sent using Sony Ericsson P990i)