As the title says, my Macbook Pro cannot handle the video files coming off of my Canon T3i. It's ridiculous! they stutter and hardly play at all, whether in quicktime or VLC. I just upgraded from Snow Leopard to Mavericks to try to fix this, but it is not even one iota better. My girlfriends Dell can handle these files for crying out loud, can anyone tell me what's going on? Working with video is very important for me