title: Does Mac X11 have the XTEST extension?
body: <p>So I moved some X programs down to the mac, and I'm getting</p>
  
  <pre><code>Error: XTEST extension unavailable on '(null)'.
  </code></pre>
  
  <p>from xdotool.</p>
  
  <ul>
  <li><p>Does OS X X11 come with XTEST?</p></li>
  <li><p>If not, is there a way to add it?</p></li>
  </ul>