Hey everyone, I have been researching how to use my iMac with Retina as a TV set for cable. Looking at Hauppauge and AverMedia and Elgato, I still am not sure what the best way to do this would be. Has anyone here figured out the best way to watch live HD video on your Mac? If you have any suggestions I would appreciate it. It seems like the only option is one of these external boxes, but maybe I'm missing an obvious solution.