title: tns can not create ng app on mac high sierra?
body: <p><a href="https://i.stack.imgur.com/F0rkn.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/F0rkn.png" alt="screenshot"></a></p>
  
  <p>The files in app folder are so weird, what are the tslib.* files? There should be app.component.* and main.ts and something else.</p>