I'm wondering if anyone has figured out how to run FCP X on an older MBP without it bogging down with maxed out CPU usage and stuttering playback? I've got a 2009, 2.4Ghz MBP with 8 gigs of Ram and a 9600m Gt card / 256mb. Stuff I've tried: Turn off the auto render: helps a ton and I had 3 streams of 1080p 30 video playing on top of each other all with color correction on them Just edit the Pro Res proxy: not sure how I can tell if I'm using the proxy of full ProRes422 codec when I edit. The more I look at FCP X the more I see that it's got a huge amount of new stuff and the more I realize I have no idea how to use it. Putting the obvious omission aside (multi-cam, tape stuff) I think the problem folks are having is that it's so different and so new that the frustration comes from not know how the hell to use all the new features.