How to remove old R base package? (R studio not working after update)

Question

I recently updated R from 2.15 to 3.1. Since the update, I have not been able to run R-Studio. R (v3.1) runs just fine independent of R-Studio. I have also tried uninstalling and re-installing R-Studio, but it won't open. Based on some sleuthing, the problem seems that R-Studio has a conflict with the older base package. (My operating system is Mavericks.)

I found a terminal command to run to check the versions -- and this is what I got:

$ ls /Library/Frameworks/R.framework/Versions/ 2.15 3.1 Current

Ok, I admit that I am not proficient with terminal commands, so I am hoping somebody could offer or point me to directions to remove the old base package. Or, if you believe that the problem with R Studio is something else, let me know!

Thanks, Brian

Answer 1

You can remove the older version using rm:

$ cd /Library/Frameworks/R.framework/Versions/
$ rm -r 2.15

If you're more comfortable with Finder, you can use that too:

$ open /Library/Frameworks/R.framework/Versions

(and just click and and delete the one you don't want)