Is there a way to tell the iOS simulator which audio device connected to your computer you want it to use?
The simulator seems to pick whatever audio device is las
Don't know if this will fix your issue, but it fixed mine.
I wanted the iOS simulator to output sound through a device I had connected and not the internal speakers. When I select the System Prefs Sound and selected my device as output, it would not work.
So, I selected the Sound Effects tab from the Prefs - Sound window and selected my device under Play Sound effects Through and presto it worked.
Don't know the in-outs of iphone sound, but apparently mine were being treated as sound effects.
Hope that helps, if not, I gave it a shot.