Aperture: Color shift when in full screen mode

If you are using a second display on a PowerBook G4 or MacBook Pro, you see a color shift on the second display when entering Full Screen mode.

Solution

To resolve the issue, make the external display your default display.

1. Open the Color Sync utility, located at /Applications/Utilities.
2. Click the Devices icon.
3. Click the disclosure triangle next to Displays.
4. Select your second display.
5. Click the Make Default button.