Follow up on above thread...I attached my computer (MACPRO) with the HDMI to the TV, and the RCA (red and white) cables for audio from the TV to an adapter to the MAC earphones port. This worked with my old macbook ,but it wasn't HDMI...it was all RCA. I choose HDMI on the TV menu and can see video, but no audio with the RCA connection. Any thoughts on how to get audio?