title: XCode doesn't recognise Core ML model files
body: <p>I download Core ML model files from Apple's web page but my mac and XCode don't recognise them. Here is what I see when I add them to my project navigator:</p>
  
  <p><img src="https://i.stack.imgur.com/YZTV4.png" alt="this is what I see when I tap on the file in XCode"></p>
  
  <p>What am I doing wrong? </p>