I have the Hitachi GD7500 dvdrom (of whom by the way i cannot find specs) and the problem is that it cant read a dvd-rw disk. On this dvd-rw disk i have burned (from a mac superdrive dvd-ram) dvd-video which i authored myself from DVDlab (pc app). Its strange cause the disk is readable on the mac as a dvdvideo, it autoruns when i insert it there, and the dvdvideo is palying acording to plan! So i dont think its the mac dvdram drive. can anyone suggest any solutions, can it be the firmware of my drive and if so, where can i get that firmware!!! Hitachi on dvdroms is nowere to be found!! can anyone help? im desperate!!!