Hi Jean,
I'm not a Mac person, just someone with an interest in Tcl/Tk,
so you'll probably get some more informed answers soon, but...
My understanding is that Aqua Tcl/Tk and X11 Tcl/Tk are not
compatible and if you combine them, you can get strange errors.
It looks like you have built R with an Aqua version
of Tcl/Tk (in /Library/Frameworks/... or wherever), so you may
run into trouble if you run R from X11 or if use addTclPath()
with Tcl/Tk directories built with X11/Fink. You can have a
look at your Tcl Path from within R, by typing:
library(tcltk)
tclvalue("auto_path")
As mentioned, the /Library/Frameworks/... Tcl/Tk directories
will be Aqua, and from memory, Fink puts things in /sw/ by
default...
OK, now I'll let someone more knowledgeable answer your question
and I'll try to convince my I.T. guys to let me play around with
installing R and Tcl/Tk on a Mac OSX machine some time to see
what I can learn... ;-)
Regards,
James