I have my 2011 mac mini connected to my Panasonic HDTV via a single HDMI cable. Nothing else is connected to my HDTV. When I go into the audio midi application, it shows two Panasonic HDMI outputs. Up until a few days ago, it correctly listed only one HDMI output. When I use EyeTV or Plex, I can toggle between the two HDMI outputs and one of them puts out audio. The other does not. How can I delete the HDMI output that doesn't work?