title: finding IOSurface headers
body: <p>I'm getting this error when I try to compile my tweak. </p>
  
  <pre><code>'IOSurface/IOSurfaceAPI.h' file not found
  #include &lt;IOSurface/IOSurfaceAPI.h&gt;
  </code></pre>
  
  <p>I've tried <a href="https://stackoverflow.com/a/11492825/754604">this answer</a>, but I can't find <code>/System/Library/Frameworks/IOSurface.framework/Headers</code> on my computer. I'm running osx 10.9.1. Thanks for the help.</p>