hi
I am experiencing choppy video playback on my Mac when viewing in FCP, Quicktime, and while it is on vimeo. The last part bewildered me but I talked to somebody at Apple and they said Vimeo actually uses some of your computer hardware to play back video even though it is online. I am not editing 4k, just 1080p, BTW. The time I notice the problem most is when viewing video footage that pans side to side or up and down. I have the Mac Pro 2010 with 32 GB ram, running on OS 10.9.5 , ATI Radeon HD 5770 1024 MB. Could it be my graphics card that is causing the problem? Can I replace?