title: Rugarch Package on R don't load on mac laptop
body: <p>I am having problems loading <code>rugarch</code> package on <code>R</code> and I really need that package for my thesis. </p>
  
  <p>I have no problem installing it. But when I try to load it I receive the following error message: </p>
  
  <blockquote>
    <p>Error : .onLoad failed in loadNamespace() for 'rgl', details:
      call: dyn.load(file, DLLpath = DLLpath, ...)
      error: unable to load shared object '/Library/Frameworks/R.framework/Versions/3.3/Resources/library/rgl/libs/rgl.so':
      dlopen(/Library/Frameworks/R.framework/Versions/3.3/Resources/library/rgl/libs/rgl.so, 6): Library not loaded: /opt/X11/lib/libGLU.1.dylib
      Referenced from: /Library/Frameworks/R.framework/Versions/3.3/Resources/library/rgl/libs/rgl.so
      Reason: image not found
    Error: package or namespace load failed for ‘rugarch’</p>
  </blockquote>
  
  <p>Any suggestions ? </p>
  
  <p>Any help would be appreciated.</p>