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HDMI Audio not working on tv My HDMI Audio isn't working. Hdmi from mac to insignia led hdtv hdmi. Tried Display Port to HDMI as well from mac display port to tv hdmi (best buy hdmi/displayport cord). 3.5mm Audio works. Neither HDMI or TV shows up as an option in sound settings of any kind, only like 5 different Audio outputs and mic things listed. I see I have Intel High Definition Audio, which lists under that as: S/PDIF Optical Digital Audio Output Line Output Internal Microphone External Microphone / iPhone Headset Headphone S/PDIF Optical Digital Audio Output ----- What do I have to do to make it work?