Would really appreciate help here. I have spent many many hours trying to work out why my High Def Video is not smooth on my Mac. I have a Sony HDR CX-12 Handy Cam. It records high def video in MTS format. And I have recently purchased the 27 inch 2.8ghz quad core Mac desk top. Firstly it does not recognise the MTS format. I find this really surprising as I have been lead to believe that most high def video comes in this format. Anyway VLC media Player plays it however it is not smooth especially when panning. Like the graphics card is not upto spec. I was advised by Apple Techs to convert it to an MOV file. So I did that and the quality is really poor. I have been to Sony, Apple and everwhere else looking for help. But no one can. And the thing is that it plays perfectly on the Sony laptops and desktops. Surely Mac arent behind the game here??? Anyway I would really appreciate any help here as I have come to a dead end. Thanks in advance.