Hello all, Long time mac user, just never posted here... Thanks for any tips on this. One thing I am trying to do is playback m4v files, or any mp4 flavor for that matter on old Power PC, G4, G5, and it's terrible at best. I have newer intel machines that handle the playback of the same files perfectly. Using the full version of quicktime pro on the old processors, added Perian_1.2.1 to playback AC3 streams, (works well) but the component to playback video smoothly is the issue. Experts: is there anything to solve this? I really hate to abandon my few but reliable Power PC machines, and want to use them as long as they will work. Thank you!