title: Xcode add Github account not possible
body: <p>Unable to select add Github (grayed out) in Xcode 10. Source control has been enabled. Any idea what causes this?</p>
  
  <p><a href="https://i.stack.imgur.com/Ld4wd.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/Ld4wd.png" alt="enter image description here"></a></p>