title: OpenGL and OSX Mavericks - error including OpenGL headers
body: <p>OSX 10.9, XCode 5.1, targeting ios7 and trying to use some OpenGL. </p>
  
  <p>I am including:</p>
  
  <pre><code>#include &lt;OpenGL/gl.h&gt;
  #include &lt;OpenGL/glu.h&gt;
  #include &lt;OpenGL/glext.h&gt;
  #include &lt;GLUT/glut.h&gt;
  </code></pre>
  
  <p>Which XCode doesn't find.</p>
  
  <p>I have added the <code>OpenGLES.framework</code> to my target as well.</p>
  
  <p>When I try and auto-complete the <code>#includes</code> it shows me <code>OpenGL/gl.h</code>, but then the compiler says it cannot find it. </p>
  
  <p>The exact error: </p>
  
  <pre><code>fatal error: 'OpenGL/gl.h' file not found
  #include &lt;OpenGL/gl.h&gt;
            ^
  </code></pre>