I am an owner of a new Mac Pro. I am having a strange problem. When I connect the HDMI output of the Mac Pro directly to my TV, all is well. But when I attach it to my receiver, the picture goes in and out. I tried adjusting the resolution settings but that didn't help. Could it be that the port on the Mac Pro is incompatible with the one on the receiver? I have a Playstation 4 and Xbox One connected to the receiver with no problems. Another interesting thing is that I tried a mini display port to DVI adapter and used a DVI to HDMI cable to the receiver and that works with no problems. So the problem is with the HDMI output just to the receiver. The only thing I can think of is that the receiver is a bit older so maybe it is in-compatable? But it does work with the PS4 and Xbox One. Any ideas would be appreciated.