title: iOS Simulator not functioning in Xcode 6.3
body: <p>I am trying to build an app, but I can't test my app because iOS Simulator isn't working. </p>
  
  <p>When I try to run iOS Simulator, it don't even get a black iPhone screen, the whole iOS Simulator window is black. I can't get it to show anything. This makes coding an app extremely difficult, especially for a beginner like me. </p>
  
  <p>Does anyone have any ideas as to why this might happen? The main interface is set to main.storyboard, and I don't get any errors when I try to run iOS Simulator, it just shows a black screen. Also, when I try to stop it I have to use Cmd+Q because the stop button doesn't work. </p>
  
  <p>Are these two related, and can anyone fix it?</p>
  
  <p>Screenshot of the problem:</p>
  
  <p><a href="https://i.stack.imgur.com/A79dB.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/A79dB.png" alt=""></a><br>
  <sub>(source: <a href="http://hostthenpost.com/uploads/4d2e2cb62d6f03a7f330affc90276f3b.png" rel="nofollow noreferrer">hostthenpost.com</a>)</sub>  </p>
  
  <p>Computer specs:
  Mac Mini (Late 2014) running OS X Yosemite 10.10.3 and Xcode 6.3.</p>