If the RStudio IDE is not able to locate R by scanning these locations, it will fall back to using whatever version of R is located at /Library/Frameworks/R.framework/. In order to support these variations, RStudio scans for the R executable in the following sequence: However, if R is installed directly from source or via a package manager like MacPorts or Homebrew, then the R executable is installed to either /usr/local/bin/R (Homebrew) or /opt/local/bin/R (MacPorts). When R is installed from CRAN on OS X, the R executable is installed at /usr/bin/R. R from source (including MacPorts and Homebrew)

Update the R.framework/Versions/Current directory alias directly using ln -s.

Run the installer from CRAN for the R version you want to be current.

To change the current version of R.Framework, you can either: You can list all of the versions of R.Framework on your system and determine which one is considered the current one by executing the following command: ls -l /Library/Frameworks/R.framework/Versions/ On Mac OS X, if the only version of R you have installed is the standard R distribution from CRAN, then by default the RStudio IDE will run against the current version of R.Framework. Note that by holding down the Control key during the launch of RStudio you can cause the R version selection dialog to display at startup.

This dialog allows you to specify that RStudio should always bind to the default 32 or 64-bit version of R, or to specify a different version altogether: You can override which version of R is used via General panel of the RStudio Options dialog. This is the version of R which RStudio runs against by default. When R is installed on Windows it writes the version being installed to the Registry as the 'current' version of R (the specific registry keys written are described here).

On Windows, the RStudio IDE uses the system's current version of R by default. The way this occurs varies between platforms-this article covers how version selection is handled on each platform. Since R versions can be installed side-by-side on a system, RStudio needs to select which version of R to run against. The RStudio IDE requires R version 3.0.1 or higher.

R studio update r version