title: OSX Using Beyond Compare as git difftool
body: <p>When trying to launch Beyond Compare using git, I get this error:</p>
  <blockquote>
  <p>The diff tool bc3 is not available as 'bcompare'</p>
  <p>fatal: external diff died, stopping at plugins/PushPlugin.m</p>
  </blockquote>
  <p>Set up diff tool:</p>
  <pre><code>$ git config --global diff.tool bc3
  </code></pre>
  <p>Try to compare directory:</p>
  <pre><code>$ git difftool plugins
  
  Viewing (1/2): 'plugins/PushPlugin.m'
  Launch 'bc3' [Y/n]: y
  </code></pre>