title: Error: Operation not permitted
body: <p>I'm getting this error when trying to install pydot</p>
  
  <pre><code>copying LICENSE -&gt; /System/Library/Frameworks/Python.framework/Versions/2.7/.
  error: [Errno 1] Operation not permitted: '/System/Library/Frameworks/Python.framework/Versions/2.7/./LICENSE'
  </code></pre>
  
  <p>If I try to change permissions it says I'm not allowed to do.</p>