The SuperDrive, included with some Power Mac G4 and iMac (Flat Panel) computers, does not read DVD-RAM discs.
Symptom
The DVD drive ejects every DVD-RAM disc, but accepts DVD-ROM and DVD-R discs, which appear on the desktop without any issues.
Solution
The SuperDrive does not read DVD-RAM discs and will eject them. They will not appear on the desktop, nor will the Finder display an alert box or error message. For more information about the discs that are compatible with the SuperDrive, see article 58770 "CD-RW and SuperDrive: Specifications and Usage Information."