This post is also on Medium.

If you want to try out the R extension for VSCode on macOS, here are the steps.

# Install R for macOS

First of all, you will need to install R for macOS itself, just download the package and install it via the official website: https://cran.r-project.org/bin/macosx/.

You will also need to install XQuartz: https://www.xquartz.org/.

Try out to run the demo via the R app:

# Install radian

radian is a popular alternative R console, to install it just follow the README in the github repository: https://github.com/randy3k/radian#installation.

If you try to run radian on your console, you might receive the runtime error `Cannot determine R HOME`

:

To find out where is the R home, open the R app again and type `.Library`

:

Set the R home via an export:

`export R_HOME=/Library/Frameworks/R.framework/Resources`

Then radian should start correctly:

Try to run some demos via radian:

Just set `R_HOME`

in your `.zshrc`

or `.bash_profile`

.

# Install the R extension in VSCode

For VSCode the most popular R extension is the one by Yuki Ueda: https://marketplace.visualstudio.com/items?itemName=Ikuyadeu.r.

Then try a test file like this test.R:

```
# add (10, 1)
add <- function(x, y) {
x + y
}
print(add (1, -2))
print(add (1.0e10, 2.0e10))
print(paste ("one", NULL))
print(paste (NA, 'two'))
print(paste ("multi-
line",
'multi-
line'))
```

However if you try to run source or run selected line, you will see a `darwin can’t use R error`

:

Use `which radian`

to find your radian path:

```
which radian
/Library/Frameworks/Python.framework/Versions/3.8/bin/radian
```

Then set it in the R extension settings in VSCode:

Also don’t forget to enable “Bracketed Paste”:

Then you should be able to run your R file:

Set the correct path for the R executable, that is relative to your R HOME:

So that the help topic view will work:

And also the function helper in the editor will work, when you hover over any function:

# R LSP Client

For linting and autocompletion, you might want to install “R LSP Client” extension by REditorSupport.

Remember to install the language server from CRAN:

# Conclusion

Now you should be able to run R using VSCode.