Symptom
Builds and slide transitions (such as the Move In transition) appear to stutter when viewed on a VGA Projector.
Solution
Builds and transitions, especially the Move In transition, can look choppy on low-end VGA projectors. To alleviate this problem, try selecting a different refresh rate, which you can set in the Displays pane of System Preferences. You can also try to fine-tune the input signal on the projector. Generally, the best results are achieved by matching the refresh rate of the projector to that of the primary monitor (60 Hz for LCD displays). This problem is not an issue with projectors that use a DVI connection.
To open the Displays pane of System Preferences:1. Choose Apple menu > System Preferences
2. Choose View > Displays.