After I installed the R studio to my mac and start running RStudion, here is what I got:
You can’t use this version of the application “RStudio” with this version of OS X.
You have OS X 10.11.6. The application requires OS X 10.12 or later.
What version of RStudio did you install? It looks like the Mac installer for 1.2.* requires 10.12 or later, but you can download from source, or you can use 1.1.* which you can install from here: