问题
I use R with RStudio on the Mac. In order to use different packages I need to use several versions of R. It seems that RSwitch is no longer available for download. How do I manage different versions of R in the easiest way on the Mac?
回答1:
This was asked and answered today on the R_SIG_Mac mailing list. It appears that the maintainer of that tool had some HD issues and some of his copies of those files were lost, leading to a bunch of dead links on the site.
Some other R core members have working links to the dmg that you can find at the link above.
That was actually a temporary problem and as of early 2015 the current and prior versions of Rswitch can be found at: http://r.research.att.com/
来源：https://stackoverflow.com/questions/13426484/how-to-manage-different-versions-of-r-on-mac