Some Mac users complain that QuickTime will become choppy both when it is recording and playing videos. However, when it comes to its performance while recording Mac screen and the file size of the recorded videos it produces, QuickTime will lose its competitive edge. As the built-in video player and screen recorder of MacBook and iMac, QuickTime can be counted as versatile. Many MacBook users may also come into the same problems mentioned above. 'How do I reduce QuickTime recordings file size?' 'How do I stop my QuickTime from lagging when I am recording my games?' And if you are disappointed with QuickTime, we also have a recommended alternative - FonePaw Screen Recorder that helps solve all the issues. This articles has complied multiple solutions to stop lags and reduce file size in QuickTime screen recording.