title: No sounds in iOS Simulator but actual device no issue
body: <p>My apps runs fine on actual device with sounds but on the iOS simulator, no sounds.
  It was ok like few weeks ago and suddenly, it becomes mute for no apparent reason.</p>
  
  <p>I am using the late 2013 Mac Pro. </p>
  
  <p>So far, I have:
  (a) Resetted the IOS sim
  (b) Multiple restarts and rebuild
  (c) Done the preference thng for Sound Effects to enable 'Play User Interface'
  (d) Plug in and out for testing with external speakers or headphones</p>
  
  <p>I must also add that this only happen when using the Mac Pro. My Mac book pro has no issues.</p>