install homals package: error


I'm trying to install the Homals package - library(homals), but keep getting this error message:

> library(homals)
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/':
  dlopen(/Library/Frameworks/R.framework/Versions/3.3/Resources/library/rgl/libs/, 6): Library not loaded: /opt/X11/lib/libGLU.1.dylib
  Referenced from: /Library/Frameworks/R.framework/Versions/3.3/Resources/library/rgl/libs/
  Reason: image not found
Error: package or namespace load failed for ‘homals’

I have a couple of my colleagues to run the same code, the same thing happens. Any solutions for this? thank you.

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