R node problem in Mac osx 10.10.5

To install R you could have a look at this Post

You might want to be aware that there have been problems with specific versions of R and KNIME under macOS. Maybe you should use a newer version of R (3.5.1), and you need the package RServe installed on your Mac.

Does R run „standalone“ on the Mac or with the help of RStudio? If not further components might have to be installed.