Hello, I'm running a Mac PowerBook G4 PowerPC with OSX 10.5.8 I was using R 2.12.xx with no problems. I tried to install R 2.13. Have never had any trouble with simply downloading the pkg and installing over previous versions. I did that, selected the packages I use regularly, set them to download with "Install Dependencies" checked and went off to sleep. When I came back in the morning, I had a message saying something to the effect of a large number of packages (dependencies) were not able to be installed. Other than that, all seemed fine. I can run codes and generally use R normally. However, if I misspell anything in the console, e.g. type "lirbary(xx)"...anything that would tell me such and such doesn't exist, it hangs indefinitely. I have to force quit. I tried uninstalling it and installing it again. I tried uninstalling it and installing a more recent build from http://r.research.att.com/ I tried uninstalling it and re-installing R 2.12 from the same site. I followed many of the instructions here, ** OS X 10.5 and higher you have to use ** For 32/64 Bit Binary pkg pkgutil --forget org.r-project.R.Leopard.fw.pkg ** For the 32 bit Tiger binary dmg: pkgutil --forget org.r-project.R.framework pkgutil --forget org.r-project.R ** Etc: ** Check for pkgs: pkgutil --pkgs | grep r-project ** UNinstall R rm -rf /Library/Frameworks/R.framework rm -rf /Applications/R.app until I couldn't find anymore R files on the computer, then re-installed, trying both 2.12 and 2.13 after first doing the above steps, and still no luck. I have also used pkgutil --unlink for the two files -- org.r-project.R.Leopard.fw.pkg, org.r-project.R.Leopard.GUI.pkg -- then restarted, installed again, all to no avail. In other words, I repeatedly deleted both the GUI and the Framework and--I believe--all associated files (e.g. Library/Receipts/bom), installed, and it did not solve the problem. No other programs on the computer seem to be running improperly. I have also created a new user on the computer and tried to install R with that user. Installation worked, but left with the same problem. There were some errors in the installation log from the installation on this new user: Jul 3 20:58:12 Macintosh-102 Installer[474]: JS: Package Authoring Error: Exception thrown while running volume check. TypeError: Result of expression 'my.target.systemVersion' [undefined] is not an object. and also a series of: Jul 3 20:59:10 Macintosh-102 Software Update[440]: Package Authoring Error: installation-check results requires a message Throughout all of this (except when I created a new user), whenever I re-installed R and started it up, it would start with the same background color I had chosen years ago, and was saying it was re-creating the history from .Rhistory (this latter part only until I went ahead and set in preferences to stop loading the history automatically). Obviously, there were still some files/settings somewhere. Finally, I downloaded an old version of appZapper capable of running on OSX 10.5 and deleted Rhistory and did the full uninstall with pkgutil...I was able to make R not load with any previous colors, etc, but the problem still exists. I also updated Java today to the newest version of Java 5, but I went into preferences and switched back to the old version, which had no effect on the problem with R. Apologies if you think this isn't an R question, and it's actually a problem of my computer, but I can't figure how that would be. Any suggestions? Any help would be greatly appreciated. Thanks! Eliot