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

Uninstalling R from your Mac should take less than 10 minutes—but I’ve seen people spend hours chasing leftover files after a botched cleanup. ⚡ The key is knowing exactly where R hides its traces, from the main app to hidden framework files.

I’ve done this dance on my own MacBooks and helped colleagues recover from partial uninstalls, so I’ll walk you through every step to ensure nothing lingers behind.

First, we’ll tackle the obvious: dragging R.app to the trash doesn’t cut it. You’ll need to hunt down its framework files in /Library/Frameworks, scrub user directories for configuration folders, and—if you installed via Homebrew—run a single Terminal command that handles the heavy lifting.

I’ll show you the exact paths and commands, including how to verify everything’s gone by checking common leftover spots like /usr/local/bin and ~/.R.

You’ll walk away with a completely clean system, no phantom R processes running in the background, and the confidence to reinstall it later without conflicts. The terminal steps might look intimidating at first, but I’ll break them down so even someone who’s never opened Terminal before can follow along.

Trust me, skipping these steps means you’ll be troubleshooting permission errors or missing libraries for weeks.

We’ll also cover the most common pitfalls—like forgotten RStudio preferences or cached package files—that trip up even experienced users. By the end, you’ll know exactly what to check if something feels off after uninstalling. Let’s get started with the foolproof cleanup process.

What you need

Step-by-step instructions for removing R from your Mac

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

Open Activity Monitor from Applications > Utilities. In the search bar, type "R" to filter processes. You'll likely see entries like RStudio, R, or Rgui. Select each and click the Quit Process button (✕ icon). If any process refuses to quit, force quit it by selecting it and choosing Quit Process from the menu bar.

This ensures no active sessions interfere with the uninstall. I always verify by checking the Dock for lingering R icons—if any remain, quit them too. Real talk: Skipping this step can leave orphaned processes that corrupt your library paths later.

Locate the original R installer package (usually in Applications or Downloads). Right-click it and select Show Package Contents. Navigate to Contents > Resources and open the uninstall script. If you don't have the original installer, download the latest version from CRAN and run the included uninstaller.

Follow the on-screen prompts—this removes core files from /Library/Frameworks/R.framework and /usr/local/bin. Wait until the uninstaller reports completion before proceeding. If you see permission errors, authenticate with your admin password. Here's the thing—some installers leave behind preference files if interrupted, so don't skip this verification step.

Open Terminal and run these commands one by one to purge all traces:

sudo rm -rf /Library/Frameworks/R.framework
sudo rm -rf /usr/local/bin/R
sudo rm -rf /usr/local/lib/R
sudo rm -rf ~/Library/R
sudo rm -rf ~/Library/Saved Application State/com.r-project.R.savedState

For each command, enter your admin password when prompted. Verify deletion by checking those directories no longer exist. This removes hidden configuration files that reinstallers might otherwise miss. I always double-check ~/Library for lingering R folders—sometimes RStudio or IDEs leave behind cached data.

If you installed R via Homebrew, run brew uninstall r in Terminal. For CRAN-installed packages, use R CMD REMOVE --all (though this requires R to be installed—skip if already removed). To completely clear package caches, navigate to:

~/Library/Caches/org.R-project.R
~/Library/Caches/Homebrew
/Library/Caches/Homebrew

Delete all contents of these folders. This step prevents future installs from inheriting corrupted package metadata. I've seen cases where leftover caches caused dependency conflicts during reinstallation.

Open Terminal and run which R. If nothing returns (just a blank line), R is fully removed. Also check for lingering files with find / -name "_R_" 2>/dev/null—this reveals any remaining traces. Delete any files flagged by this command.

Finally, reboot your Mac. This ensures all kernel-level caches are cleared. After reboot, try launching R from Terminal—you should see "command not found". If you still encounter R-related errors, check ~/Library/LaunchAgents and /Library/LaunchDaemons for any R-related plist files and remove them.

Tips & tricks for complete R removal on Mac

Here's what I've learned after cleaning up R installations for colleagues who kept encountering phantom processes and corrupted libraries.

Process Verification: In Step 1, don't stop at Activity Monitor—open Terminal and run ps aux | grep -i R to catch any hidden processes. I once missed a background R session that kept recreating itself until I found it this way. Also check for R-related background services in System Preferences > Users & Groups > Login Items—some IDEs like RStudio leave persistent launchers.

Installer Recovery: If you can't find your original R installer, download the latest version from CRAN and run its uninstaller instead. The uninstall scripts are identical between versions, so this works perfectly. I've used this trick when colleagues accidentally deleted their original installers—it's a lifesaver. Just remember to authenticate with your admin password when prompted during the uninstall process.

Terminal Command Safety: When running the sudo rm -rf commands in Step 3, double-check each path before executing. I recommend opening each directory in Finder first to visually confirm you're about to delete R-related files. This prevents accidental deletion of important system files. Also consider adding echo before each command to preview what will be deleted without actually executing it.

Cache Cleanup Strategy: For Step 4, I recommend creating a backup of your Homebrew cache before deleting it. Run mkdir ~/Rcachebackup then cp -r ~/Library/Caches/Homebrew ~/Rcachebackup before deletion. This gives you a safety net if you accidentally remove something critical. The R cache specifically (org.R-project.R) can usually be deleted entirely—it's just temporary files that won't affect future installs.

Frequently asked questions

Got questions about uninstalling R from your Mac? Here are some common concerns—and their answers—to make the process smoother.

Wrapping up and next steps

Uninstalling R from your Mac doesn’t have to be a headache—with the right steps, you can completely remove it and any lingering files in no time. Whether you’re freeing up space or switching to another tool, a clean slate ensures your system runs smoothly.

Now that you’ve mastered the process, why not explore other data tools or optimize your workflow further? 🚀

Ready for the next challenge? Check out guides on installing Python or managing macOS apps efficiently—your tech toolkit is about to get even stronger!