Many thanks to all who replied to this post. the problem has now been sorted out. i installed "GCC-10.7-v2.pkg", now i can install packages from source
-- View this message in context: http://r.789695.n4.nabble.com/R-on-mac-not-installing-packages-tp4659392p4659414.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.