I’ve been getting quite frustrated with Adobe Premiere CS6 on my mac. It kept crashing and playback wasn’t as smooth as it is with Final Cut. Last week I upgrade my MacBook to Mountain Lion and noticed a small but noticeable improvement to the systems responsiveness. Today, while working on an edit and getting fed up with it crashing (something I’m really not used to on a Mac) out of frustration I decided to upgrade the OS to Mountain Lion.
Wow, I wish I had done this earlier. What a difference. Clips play back smoothly, the system is more responsive and so far it has not yet crashed. So if your using Premiere CS6 and you are having issues I recommend you upgrade to Mountain Lion.