Hi, I just plugged a set of external speakers into the audio out port of my Mac-mini mid-2011 running Lion and I get no output. And headphones do not show up as a choice in Sound, Output. Just Internal Speakers are in the list. I tried plugging the stereo jack in a bunch of times to see if it would recognize the speakers but no dice. I also tried going into Utilities > Audio MIDI Setup and trying different decoders in there but again no dice. I see a number of people with Lion have been having difficulty with audio out but none of the suggestions has worked so far. .