title: Xcode6 can't run any app in simulator ( Domain = NSPOSIXErrorDomain, Code = 3 )
body: <p>No app can run in my simulator, although building is good.</p>
  <h3>Error messsage is below:</h3>
  <blockquote>
  <p>Unable to run app in Simulator</p>
  <p>An error was encountered while running (Domain = NSPOSIXErrorDomain, Code = 3)</p>
  </blockquote>