title: Expo Error when running Xcode iOS Simulator: No iPhone devices available in Simulator
body: <p>I am trying to run a React-Native project on the xCode iOS Simulator using Expo, and I get the following errors: </p>
  
  <p><b>There was a problem booting a device in iOS Simulator. Quit Simulator, and try again.</p>
  
  <p>Error installing or running app. Error: No iPhone devices available in Simulator.</b></p>
  
  <p>If I quit the simulator and try again I get these errors:</p>
  
  <p><b>iOS Simulator device failed to boot. Try opening Simulator first, then running your app.</p>
  
  <p>Error installing or running app. Error: Timed out waiting for iOS Simulator device to boot.</b></p>
  
  <p>I have tried checking there are devices under the hardware tab of the Simulator.</p>
  
  <p>Any advice?</p>