Hmm, I'm pretty new to the mac world and don't have many drivers for other peripherals installed, though some things have acted funny (tried using a Western Digital external hard drive for video editing, made sure all Firewire extensions etc. were up to date and still no luck. Probably some sort of conflict, but seeing as a second LaCie external we had plugged in and worked immediately, we just used it). I enlisted the help of some more informed mac folks with the CD-RW and still had no luck, so I've since returned the drive and ordered the popular APS USB drive, which should be here Monday ; )