iDVD: Compatibility information for DVD-R playback devices
iDVD, iDVD 2, iDVD 3, and iDVD 4 can produce DVDs that can be played on:
Most standard set-top DVD players
Most computers with DVD Video drives
DVD-R discs produced with Apple SuperDrives are compatible with a wide variety of DVD hardware. Check the documentation that came with your player or with the manufacturer to find out if it is compatible with DVD-R media.