Package Installation in osx

Dear List:
Wondering how to get around the following problem: any suggestions are welcome. Cheers,
Ehsan
install.packages("geepack")Warning in install.packages("geepack") :? argument 'lib' is missing: using '/home/grad/student/Library/R/2.11/library'--- Please select a CRAN mirror for use in this session ---Loading Tcl/Tk interface ... doneError in structure(.External("dotTclObjv", objv, PACKAGE = "tcltk"), class = "tclObj") :?? [tcl] invalid command name "toplevel".In addition: Warning message:In fun(...) : no display name and no $DISPLAY environment variable
R.Version()$platform[1] "x86_64-apple-darwin9.8.0"$arch[1] "x86_64"$os[1] "darwin9.8.0"$system[1] "x86_64, darwin9.8.0"$status[1] "Under development (unstable)"$major[1] "2"$minor[1] "11.0"$year[1] "2010$month[1] "03"$day[1] "14"$`svn rev`[1] "51276"$language[1] "R"$version.string[1] "R version 2.11.0 Under development (unstable) (2010-03-14 r51276)"
This was garbled en route, but

(a) Your R is far too old: please update as the posting guide asked of 
you.  (You seem to be using a pre-release of 2.11.0.)

(b) You need to set DISPLAY, as the message says.  It usually is set 
at a Mac OS X console, so perhaps you need to ask on R-sig-mac about 
that.

Dear List:
Wondering how to get around the following problem: any suggestions are welcome. Cheers,
Ehsan

install.packages("geepack")Warning in install.packages("geepack") :? argument 'lib' is missing: using '/home/grad/student/Library/R/2.11/library'--- Please select a CRAN mirror for use in this session ---Loading Tcl/Tk interface ... doneError in structure(.External("dotTclObjv", objv, PACKAGE = "tcltk"), class = "tclObj") :?? [tcl] invalid command name "toplevel".In addition: Warning message:In fun(...) : no display name and no $DISPLAY environment variable

R.Version()$platform[1] "x86_64-apple-darwin9.8.0"$arch[1] "x86_64"$os[1] "darwin9.8.0"$system[1] "x86_64, darwin9.8.0"$status[1] "Under development (unstable)"$major[1] "2"$minor[1] "11.0"$year[1] "2010$month[1] "03"$day[1] "14"$`svn rev`[1] "51276"$language[1] "R"$version.string[1] "R version 2.11.0 Under development (unstable) (2010-03-14 r51276)"

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Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
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