I just want to give everyone a heads up about this (as far as I'm aware) little known app by the name of Movist. It is by far the most stable App I have come across on Mac to play any form of video (iTMS content aside, obviously). It doesn't even look ugly when you first download it, which I think VLC does. And there's quite a few themes out there for it. Anyway, I love this b/c it handles MKV's beautifully. Quicktime needs to load the whole damn thing first, 20 mins a time, and then still stutters. VLC stutters sometimes, especially 1080p (2.4Ghz MBP, 3GB RAM) - and if you try and fast forward, oooh, it is pixel hell for a good 15 seconds. All jamming and freezing! With Movist I can fast forward, rewind, seek, and jump scenes - not so much as a single frozen pixel. Honestly, its very fluid - amazing. A lot of people have resorted to Plex to play media which VLC can't handle, but IMO Plex is absolutely horrendous to get around - this is super simple. Support this one guys, its amazing.