title: Run on iOS 13 device using Xcode without iOS 13
body: <p>Whoops, I upgraded my phone with the iOS 13 beta. I haven't upgraded to Catalina beta on my computer, and I'd rather not. </p>
  
  <p>When I try to run an app on my phone, Xcode 10.3 on my computer running macOS Mojave 10.14.5 is saying </p>
  
  <blockquote>
    <p>Could not locate device support files. This phone is running iOS 13.0 which may not be supported by this version of Xcode.</p>
  </blockquote>
  
  <p>App Store isn't showing any newer Xcode, and Preferences > Components > Simulators isn't showing an iOS 13 simulator. </p>
  
  <p>Am I screwed?</p>