How to Uninstall R on Mac: Complete Removal Without Lingering Files

Uninstalling R from your Mac can feel like trying to erase a stubborn graffiti tag—if you don’t hit the right spots, it just comes back. I’ve spent hours cleaning up incomplete removals where leftover files caused permission errors or corrupted new installs.

The key is targeting R’s hidden directories and package manager traces, not just dragging the app to the trash.

Most users install R via the .pkg installer or Homebrew, and each method leaves different remnants behind. The .pkg version hides its libraries in /Library/Frameworks/R.framework, while Homebrew stashes them in /usr/local/lib/R. Forgetting these spots means your system will still recognize R commands—until you run into dependency conflicts later.

I’ll walk you through the exact commands to purge both, plus how to verify nothing’s left behind.

You’ll need Terminal access and admin privileges—no special tools, just your password and about 10 minutes of focused work. The process is straightforward once you know where to look: we’ll delete the framework, clear library caches, and scrub package manager records.

Worst case, you might lose custom library files, but I’ll show you how to back those up first if you’re worried.

After we’re done, running R --version in Terminal should return nothing. No lingering config files, no phantom dependencies—just a clean slate.

This is the method I’ve used to prep machines for fresh R installations in my Denver tech center, and it’s saved more than a few users from headaches when switching between R versions or environments.

What you need

Step-by-Step instructions for removing R from macOS completely

Here's the foolproof method I use to purge R and all its dependencies from macOS.

Open Activity Monitor from your Applications folder. Search for any processes containing "R," "RStudio," or "libR." Select each one and click the Quit Process button. This ensures no background scripts or sessions interfere with removal.

If you're using RStudio, close it completely before proceeding. Sometimes RStudio keeps temporary files open, and deleting them while active can corrupt your system libraries. Force-quit if it doesn't respond normally.

Navigate to /Applications/Utilities and open Terminal. Run the following command to locate the R uninstaller: sudo /Library/Frameworks/R.framework/Resources/uninstall.sh. Enter your administrator password when prompted—this launches the official R uninstall script.

Follow the on-screen prompts to confirm removal. The script handles most system-level files but may leave behind user-installed packages. After completion, verify R is gone by typing R --version in Terminal—you should see "command not found."

User-installed packages often linger in ~/Library/R. Open Terminal and run rm -rf ~/Library/R to delete these files permanently. This removes package caches, documentation, and compiled libraries that aren't cleaned by the official uninstaller.

For system-wide packages, check /Library/Frameworks/R.framework/Resources/library and /usr/local/lib/R. Delete any remaining folders manually, but be cautious—only remove files explicitly related to R. If unsure, verify with ls -la before deleting.

R often modifies your shell configuration files to add its paths. Open ~/.bashprofile, ~/.zshrc, or ~/.profile (depending on your shell) in a text editor. Search for lines containing RHOME, PATH, or LD_LIBRARY_PATH and remove them.

Save the file and reload your shell with source ~/.zshrc (or the appropriate file for your shell). This ensures R-related paths don't accidentally reactivate during future terminal sessions.

Open Terminal and attempt to run R or Rscript. Both should return "command not found." Check for lingering files with mdfind -name "R*"—this searches all system locations for R-related files. Delete any remaining entries manually.

For thoroughness, restart your Mac. After reboot, run which R and which Rscript again—no output confirms complete removal. If you plan to reinstall R later, this clean slate ensures no conflicts.

Tips & tricks for complete R removal on macOS

Here's what I've learned after cleaning up R installations for colleagues who kept getting mysterious errors after uninstalling.

Double-Check for Hidden RStudio Processes: In Step 1, don't stop at just R and libR processes. Look for anything containing "RStudio" or "XQuartz" in Activity Monitor—these often lurk in the background even when RStudio appears closed. I caught a stubborn RStudio process running under the name "RStudio-GUI" that caused conflicts during reinstallation later.

Backup Critical Configuration Files First: Before running the uninstall script in Step 2, create a backup of your shell configuration files (~/.bashprofile, ~/.zshrc, ~/.profile). While we're removing R-related paths, you might accidentally delete important customizations. I use cp ~/.zshrc ~/.zshrc.bak before making any changes—this creates a safety net if something goes wrong.

Shell-Specific Cleanup Matters: The cleanup in Step 4 requires shell-specific knowledge. If you're using zsh (default on newer macOS), focus on ~/.zshrc. For bash users, check ~/.bashprofile. Fish shell users need to look at ~/.config/fish/config.fish. I once spent hours troubleshooting why R kept appearing until I realized my colleague was using Fish shell and hadn't cleaned up the right configuration file.

Frequently asked questions

Got questions about removing R from your Mac? Here are some common concerns—and their answers—to help you uninstall smoothly.

Wrapping up and next steps

Uninstalling R from your Mac doesn’t have to be a headache—you’ve now got the know-how to clean up every trace of the software and its leftover files. Whether you’re freeing up space, switching tools, or just decluttering, taking these steps ensures a thorough, hassle-free removal. 🎉

Ready to reclaim your system’s speed and storage? Check out our guide on optimizing your Mac’s performance next—because a clean machine is a happy machine! 🚀