> library(tcltk)
Loading Tcl/Tk interface ... Error : .onLoad failed in loadNamespace() for 'tcltk', details:
  call: dyn.load(file, DLLpath = DLLpath, ...)
  error: unable to load shared library '/Library/Frameworks/R.framework/Resources/library/tcltk/libs/x86_64/tcltk.so':
  dlopen(/Library/Frameworks/R.framework/Resources/library/tcltk/libs/x86_64/tcltk.so, 10): Library not loaded: /usr/X11R6/lib/libX11.6.dylib
  Referenced from: /usr/local/lib/libtk8.5.dylib
  Reason: image not found
Error: package/namespace load failed for 'tcltk'

I had installed tcltk-8.5.5-x11.dmg
X11 is running

> sessionInfo()
R version 2.11.1 (2010-05-31) 
x86_64-apple-darwin9.8.0 

locale:
[1] en_US.UTF-8/en_US.UTF-8/C/C/en_US.UTF-8/en_US.UTF-8

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base     

loaded via a namespace (and not attached):
[1] grid_2.11.1         lattice_0.18-8      latticeExtra_0.6-11


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