Hello,

I am trying to load the openCyto package, however whenever I try to I receive an error message which states

library("openCyto", lib.loc="/Library/Frameworks/R.framework/Versions/3.4/Resources/library")
Error: package or namespace load failed for ‘openCyto’:
 .onLoad failed in loadNamespace() for 'rgl', details:
  call: dyn.load(file, DLLpath = DLLpath, ...)
  error: unable to load shared object '/Library/Frameworks/R.framework/Versions/3.4/Resources/library/rgl/libs/rgl.so':
  dlopen(/Library/Frameworks/R.framework/Versions/3.4/Resources/library/rgl/libs/rgl.so, 6): Library not loaded: /opt/X11/lib/libGLU.1.dylib
  Referenced from: /Library/Frameworks/R.framework/Versions/3.4/Resources/library/rgl/libs/rgl.so
  Reason: image not found

How do I address this?

Looks like a problem with rgl instead of openCyto. From the CRAN landing page of rgl, the system requirements include OpenGL, GLU Library, XQuartz (on OSX), so I suppose that you do not have one or more of those installed, or they are installed but not in the location expected (/opt/X11/lib/ in the error above. So probably you need to make your system conform with these expectations, or build rgl from source as outlined in the README file.