title: Xcode 6 GM not launching on OS X Yosemite
body: <p>Xcode 6 GM isn't running on my Yosemite Build 7.
  The Icon bounces up and down on the dock until I quit the application.</p>
  
  <p>I have tried re-installing and the issue persists.
  I have also tried Xcode 5.1.1 and Xcode 6 beta.</p>
  
  <p>Any ideas?</p>