title: The working copy '<Project Name>' failed to commit files - Couldnt communicate with helper application
body: <p>I've just updated to Xcode 7 general release and ive tried committing files. Its failing however, and im getting the following message;</p>
  
  <p><a href="https://i.stack.imgur.com/4xYz1.png" rel="noreferrer"><img src="https://i.stack.imgur.com/4xYz1.png" alt="enter image description here"></a></p>
  
  <p>Ive seen this question but the secondary response is different in the OP question: <a href="https://stackoverflow.com/questions/14694662/xcode-and-git-source-control-the-working-copy-xxxxx-failed-to-commit-files">Xcode and Git Source Control : “The working copy XXXXX failed to commit files”</a></p>
  
  <p>Whats the 'helper application' that it is looking for and whats the solution? Migrating to Xcode 7 and iOS9 is becoming a headache :(
  I commit my files by going to 'Source Control' -> 'Commit'</p>