title: iOS Simulator not launching after xcode update
body: <p>Hi my IOS simulator was working fine with Visual Studio 2017 until recent XCode update and License agreement. I started to run my xamarin app from Visual studio 2017, it showed me error - "xcode license must be accepted in order to be connected". I started my xcode and accepted my licence. iOS simulator 10.3 version got updated to iOS 11. 
  When i try to run my application, IOS simulator starts but doesn't launch fully.</p>
  
  <p>I am running my app from Windows machine VS2017- connected mac server agent.
  Do i need to do any more update?</p>