title: trigger.io won't launch IOS simulator
body: <p>Trigger.io recently stopped launching the iOS simulator when running an iOS build. Look like it might be a xcode version issue? It gets to this step and hangs</p>
  
  <pre><code>[INFO] Running iOS Simulator
  [DEBUG] Looking for apps at /Users/kevisazombie/Projects/Web/zombiebros/beatdowncity/development/ios/simulator-*/
  [DEBUG] Trying to run app /Users/kevisazombie/Projects/Web/zombiebros/beatdowncity/development/ios/simulator-ios.app/
  [DEBUG] Detected XCode version 4.3 or newer
  [DEBUG] Using configuration file value u'6.0' for ios.simulatorsdk
  [DEBUG] Using configuration file value u'iphone' for ios.simulatorfamily
  [INFO] Starting simulator
  [DEBUG] Running: '/Users/kevisazombie/Projects/Web/zombiebros/beatdowncity/.template/lib/ios-sim-xc4.3' 'launch' '/Users/kevisazombie/Projects/Web/zombiebros/beatdowncity/development/ios/simulator-ios.app/' '--stderr' '/var/folders/n6/vlm01gxx2zd0qs35yqh70d8r0000gn/T/tmpL_tpLB' '--sdk' '6.0' '--family' 'iphone'
  [INFO] Showing log output:
  [DEBUG] Running: 'tail' '-f' '/var/folders/n6/vlm01gxx2zd0qs35yqh70d8r0000gn/T/tmpL_tpLB'
  [DEBUG] 2013-05-11 10:48:21.309 ios-sim-xc4.3[674:507] stderrPath: /var/folders/n6/vlm01gxx2zd0qs35yqh70d8r0000gn/T/tmpL_tpLB
  [DEBUG] Unknown or unsupported SDK version: 6.0
  [DEBUG] [DEBUG] Simulator SDK Roots:
  [DEBUG] [DEBUG] 'Simulator - iOS 6.1' (6.1)
  [DEBUG]     /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator6.1.sdk
  </code></pre>