I have been searching high and low for a an actual graphics card with sdi output that has mac support with no success. Pc users have several to choose from but nobody seems to want to even approach the mac platform. what will it take to get this to happen? You would think with a fair amount of macs in the broadcast/video editing world that someone could make money doing this. Have I missed something? Is there something out there??? Is someone working on it? It would seem that this would solve many problems and greatly expand our flexibility with catalyst.