title: rugarch will not load, but can install just fine (on mac)
body: <p>I am having trouble loading rugarch. I can install it no problem </p>
  
  <pre><code>install.packages('rugarch')
  </code></pre>
  
  <p>However, when I try to load it, I get errors</p>
  
  <pre><code>library(rugarch)
  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/3.2/Resources/library/rgl/libs/rgl.so':
    dlopen(/Library/Frameworks/R.framework/Versions/3.2/Resources/library/rgl/libs/rgl.so, 6): Library not loaded: /opt/X11/lib/libGLU.1.dylib
    Referenced from: /Library/Frameworks/R.framework/Versions/3.2/Resources/library/rgl/libs/rgl.so
    Reason: image not found
  Error: package or namespace load failed for ‘rugarch’
  </code></pre>
  
  <p>I have tried upgrading R, reinstalling the package both to no avail. Here is my system settings:</p>
  
  <pre><code>sessionInfo()
  R version 3.2.1 (2015-06-18)
  Platform: x86_64-apple-darwin13.4.0 (64-bit)
  Running under: OS X 10.10.2 (Yosemite)
  
  locale:
  [1] en_US.UTF-8/en_US.UTF-8/en_US.UTF-8/C/en_US.UTF-8/en_US.UTF-8
  
  attached base packages:
  [1] parallel  stats     graphics  grDevices utils     datasets  methods  
  [8] base     
  
  other attached packages:
  [1] foreach_1.4.2                 blotter_0.9.1666             
  [3] FinancialInstrument_1.2.0     PerformanceAnalytics_1.4.3541
  [5] quantmod_0.4-5                TTR_0.23-0                   
  [7] xts_0.9-7                     zoo_1.7-12                   
  
  loaded via a namespace (and not attached):
   [1] codetools_0.2-14   lattice_0.20-33    mvtnorm_1.0-3      truncnorm_1.0-7   
   [5] grid_3.2.1         KernSmooth_2.23-15 misc3d_0.8-4       spd_2.0-1         
   [9] iterators_1.0.7    tools_3.2.1        numDeriv_2014.2-1  Rsolnp_1.15  
  </code></pre>
  
  <p>Any help would be appreciated. Also I have tried to download it from the cran page but that gives the same error. For what its worth, rugarch will install and load on my windows computer running <code>3.2.0</code> 64-bit computer.</p>
  
  <p>I tried to install an older version of rugarch from <a href="https://cran.r-project.org/src/contrib/Archive/rugarch/" rel="nofollow">https://cran.r-project.org/src/contrib/Archive/rugarch/</a> but it wont even install. I tried <code>1.3-3, 1.3-1, and 1.2-9</code>. This is the error I get:</p>
  
  <pre><code>gfortran-4.8: warning: couldn’t understand kern.osversion ‘14.1.0
  installing to /Library/Frameworks/R.framework/Versions/3.2/Resources/library/rugarch/libs
  ** R
  ** data
  ** inst
  ** preparing package for lazy loading
  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/3.2/Resources/library/rgl/libs/rgl.so':
    dlopen(/Library/Frameworks/R.framework/Versions/3.2/Resources/library/rgl/libs/rgl.so, 6): Library not loaded: /opt/X11/lib/libGLU.1.dylib
    Referenced from: /Library/Frameworks/R.framework/Versions/3.2/Resources/library/rgl/libs/rgl.so
    Reason: image not found
  ERROR: lazy loading failed for package ‘rugarch’
  * removing ‘/Library/Frameworks/R.framework/Versions/3.2/Resources/library/rugarch’
  Warning in install.packages :
    installation of package ‘/Downloads/rugarch_1.2-9.tar.gz’ had non-zero exit status
  </code></pre>