title: How to use XCode's mergetool to resolve conflicts?
body: <p>I'm in the middle of a rebase and I need to fix some merge conflicts. When I open the file in XCode, I see the source control conflict markers (&lt;&lt;&lt;&lt;&lt;&lt;&lt;, etc) in the file. </p>
  
  <p>How can I use XCode's mergetool to resolve these conflicts in a graphical fashion? I'm looking for this screen:</p>
  
  <p><a href="https://i.stack.imgur.com/jc1RX.png" rel="noreferrer"><img src="https://i.stack.imgur.com/jc1RX.png" alt="enter image description here"></a></p>