title: Knit in R studio - Error message - File not found in directory
body: <p>I just completed a project in RMD and my script wont knit. First I get an error message saying file not in directory.</p>
  <p>Then in the render console it as the error message</p>
  <pre><code>Line 535 Error in check_for_XqQuartz()
  X11 library is missing: install XQuartz.macosforge.org
  </code></pre>
  <p>The problem is the app won't download on my mac.</p>
  <p>Please see three attached screenshots for more information</p>
  <p><a href="https://i.stack.imgur.com/ty90j.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/ty90j.png" alt="enter image description here" /></a></p>
  <p><a href="https://i.stack.imgur.com/2Pwws.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/2Pwws.jpg" alt="enter image description here" /></a></p>
  <p><a href="https://i.stack.imgur.com/keYLp.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/keYLp.jpg" alt="enter image description here" /></a></p>