Symptom
When you open DVD Player 3.0 after an external monitor or TV has been connected an alert box with this message appears:
"This machine configuration is not supported."
When you open DVD Player 3.0 before an external monitor or TV is connected, you can hear the movie, but no see no video when it is played.
Solution
1. Make sure the computer is not in video mirroring mode, which is incompatible with DVD Player 3.0. You can turn off video mirroring in the Displays pane of System Preferences.
2. Download and install Mac OS X 10.1.3 or later. It is available using the Software Update pane of System Preferences, or from Apple Software Downloads (http://www.apple.com/swupdates/).