Apple yesterday issued an update to its FaceTime application for Mac OS X available in the Mac App Store. According to the release notes, the update brings improved performance for full screen video.
While FaceTime had been a free application during the beta testing phase and comes preinstalled on new MacBook Pros, Apple charges $0.99 for existing Mac owners to download the application through the Mac App Store. The charge is said to be due to accounting requirements related to the addition of a significant new feature not advertised at the time of sale of earlier machines.What's new
Improves performance when FaceTime is taken full screen.
Article Link: Apple Improves Full Screen Performance on FaceTime for Mac