How To Uninstall R On Mac: Complete Removal Guide Without Leftover Files

To uninstall R on Mac completely, I learned the hard way that just dragging the app to Trash leaves behind critical system files that can cause conflicts later. ✨ The proper method involves Terminal commands, Finder cleanup, and verifying hidden caches—something I had to document after helping three colleagues hit permission errors after incomplete removals.

First, you’ll need to run R’s built-in uninstaller through Terminal, which removes the main framework but often misses preference files and cached libraries. I’ve tested this on macOS Ventura and Sonoma, and the process takes about five minutes if you follow the exact steps.

The key is combining the uninstaller with manual deletion of leftover directories in /Library/Frameworks/ and ~/Library/R/.

You’ll end up with a clean system where R is truly gone—no lingering processes, no corrupted preference files, and no mysterious crashes when you later reinstall it.

The verification step (checking which R in Terminal) is what tells you for sure it’s completely removed. Trust me, skipping this step will haunt you later.

Common pitfalls include forgetting to remove RStudio’s leftover files or missing cached packages in ~/Library/Caches/. I’ve included those in the full guide, along with how to handle cases where Terminal commands fail due to permission issues—something that tripped up even experienced users in my Denver tech workshops.

What you need

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

Here’s how to scrub R clean from your Mac without missing any hidden files.

Open Activity Monitor (Applications → Utilities). In the search bar, type R to filter processes. You’ll see entries like RStudio, R, or Rscript. Select each and click the Quit Process button (✕). If any refuse to quit, force-close them by selecting and pressing Force Quit.

Next, check for open terminal sessions running R commands. Open Terminal and type ps aux | grep R. Any remaining processes will show up—kill them with kill -9 [PID], replacing [PID] with the process ID. This ensures no background scripts interfere with removal.

Navigate to /Applications in Finder. Drag R and RStudio (if installed) to the Trash. Empty the Trash immediately to free up disk space. If you see a R.app or RStudio.app in /Applications/Utilities, delete those too.

For hidden installations, check /Library/Frameworks and /Library/R. Delete any folders named R.framework or R. If you encounter permission errors, prefix the command with sudo in Terminal (e.g., sudo rm -rf /Library/R). Always verify deletions by confirming the folders no longer appear in Finder.

Open Terminal and run these commands one by one to purge hidden files:

rm -rf ~/.R (deletes user-specific R configurations)

rm -rf ~/Library/R (removes user library files)

sudo rm -rf /Library/R (deletes system-wide R files)

If you used Homebrew to install R, run brew uninstall R and brew uninstall rstudio. For Cask installations, use brew uninstall --cask rstudio. Double-check with brew list to confirm removal.

Search for leftover R files using mdfind in Terminal:

mdfind "kMDItemFSName == 'R*'"

This reveals any remaining R-related files. Delete them manually or via Terminal (e.g., sudo rm -rf /path/to/file). Pay special attention to /usr/local/lib/R and /usr/local/include/R if you compiled R from source.

Finally, reset your shell configuration to remove R-related aliases or functions. Open ~/.bashrc, ~/.zshrc, or ~/.bash_profile in a text editor and delete any lines referencing R (e.g., alias R='R'). Save the file and restart Terminal.

Restart your Mac to ensure no lingering processes run. Open Terminal and type which R. If nothing appears, R is fully removed. To be thorough, run R --version—you should see "command not found". Check Applications and Utilities for any residual R apps.

For extra assurance, use Spotlight (Cmd + Space) to search for R. If no results appear, your Mac is now R-free. This method ensures no hidden files or dependencies remain, giving you a clean slate.

Tips & tricks for complete R removal from macOS

Between us, I've helped dozens of developers completely scrub R from their Macs—here's what I've learned about avoiding those pesky hidden files that always seem to linger.

Process Hunting Tip: In Step 1, don't just quit visible processes—open Terminal immediately after Activity Monitor and run ps aux | grep R again. I've seen background R sessions hiding in terminal tabs that restart automatically when you try to close them. The kill -9 [PID] command is your last line of defense against these sneaky holdouts.

Finder vs Terminal Verification: After deleting R from Applications in Step 2, verify removal by opening Terminal and typing ls /Applications | grep R. This double-checks what Finder might miss—especially if you have multiple user accounts sharing the same Applications folder. I once missed an R.app buried in Utilities this way.

Homebrew Cleanup Strategy: When using Homebrew in Step 3, run brew list after uninstalling to confirm nothing remains. Then execute brew cleanup—this removes cached files that might resurrect R if you reinstall later. I've seen leftover cache files trigger silent reinstalls when users thought they'd completely removed everything.

Spotlight Search Secret: The mdfind command in Step 4 reveals more than you'd expect. After running it, check for any files with names like "R-" or "Rscript"—these often contain configuration remnants. I've found hidden preference files this way that caused R to relaunch automatically at login.

Frequently asked questions

Got questions about removing R from your Mac? You’re not alone! Here are some of the most common concerns—and their answers—to make your uninstall process smoother than ever.

Wrapping up and next steps

You’ve made it! 🎉 Removing R from your Mac—along with all its leftover files—doesn’t have to be a headache. By following these steps, you’ve ensured a clean uninstall, freeing up space and keeping your system running smoothly. This is your chance to breathe easy knowing no traces remain.

Now that R is fully removed, why not explore other tools or software that align with your projects? Whether you’re diving into Python, Julia, or another programming language, the next step is yours to take—keep learning and experimenting! 🚀