How To Uninstall R On Mac: Complete Removal Without Lingering Library Files

To uninstall R on Mac completely, you’ll need more than just dragging the app to Trash—leftover library files and environment variables can leave traces behind.

I’ve removed R from my MacBook Pro twice now, and the second time I learned the hard way that skipping the terminal cleanup leaves behind hidden files that resurface later.

The process takes about 10 minutes if you follow the right steps, and I’ll walk you through every command and GUI move to ensure nothing lingers.

The key is targeting three areas: the R application itself, the hidden library files in your home directory, and any lingering environment variables that might cause conflicts. I use Homebrew for package management, so I’ll include those commands too—skipping them leaves behind dependencies that can mess up future installs.

You’ll need Terminal access and a bit of patience for the verification steps, but the payoff is a clean slate ready for reinstallation or another package.

Once you’re done, you’ll have a Mac free of R’s remnants, no phantom library files cluttering your system, and no unexpected behavior when you reinstall later. I’ve tested this on macOS Sonoma and Ventura, and it works every time—no more "R not found" errors when you least expect them.

The verification step is where most people stumble, so I’ll show you exactly how to check for lingering traces.

This method covers both RStudio and the base R package, so whether you’re switching to Python or just clearing space, you’ll end up with a properly cleaned system.

Fair warning: if you’ve installed R through multiple methods, you’ll need to adapt the commands slightly—but I’ll flag those spots so you don’t miss anything. Let’s get started with the complete removal process.

What you need

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

Here's the foolproof method I use to scrub R and its libraries cleanly from macOS.

Before touching anything, open the Activity Monitor (Applications > Utilities). Search for any processes containing "R" or "RStudio" and force-quit them. This prevents file-locking errors during deletion.

Next, close RStudio if it's open—don't just minimize it. A running instance can interfere with package removal later. I always double-check by pressing Command + Space, typing "RStudio," and confirming it's not lurking in the background.

Open Terminal (Applications > Utilities) and run brew uninstall r. This removes the main R installation but leaves behind configuration files and some libraries. Wait for the uninstall to complete—it typically takes 30-60 seconds—before proceeding.

If you installed R via the CRAN macOS binary instead of Homebrew, navigate to /Library/Frameworks/R.framework in Finder and drag the entire R.framework folder to Trash. Empty Trash immediately after to free up disk space.

Run these three commands in Terminal one by one to remove leftover files:

rm -rf ~/Library/R (removes user-specific R libraries)

sudo rm -rf /Library/Frameworks/R.framework (removes system-wide framework if it exists)

sudo rm -rf /usr/local/lib/R (clears any lingering libraries)

When prompted for your password, enter it—you won't see typing feedback, but the command will execute. This step ensures no residual package data remains that could cause conflicts with future installations.

Open Terminal and type which R. If R is fully removed, you'll see nothing returned. Next, run R --version—you should get a "command not found" error. This confirms R is no longer accessible from the command line.

For thoroughness, search your Mac for remaining files by running sudo find / -name "_R_" 2>/dev/null. This lists any hidden R-related files. Delete each manually if they appear—most will be harmless, but some may indicate incomplete removal.

If you used R frequently, your shell configuration (like .bashrc or .zshrc) may have R-related paths. Open your shell config file—nano ~/.zshrc for most modern Macs—and remove any lines containing "R," "R_LIBS," or "PATH" modifications related to R.

Save the file (Control + O, then Enter), then reload it with source ~/.zshrc. This prevents accidental attempts to run R commands in future Terminal sessions.

Tips & tricks for completely removing R from your Mac

These essential tips will help you avoid common pitfalls and ensure R is completely eradicated from your system without leaving any traces behind.

Double-Check Running Processes: In Step 1, don't just rely on Activity Monitor—open Terminal and run ps aux | grep -i R to catch any hidden R processes. I've caught lingering R sessions this way that Activity Monitor missed. This extra verification prevents those frustrating "file in use" errors during deletion.

Backup Important Configuration Files: Before executing any rm -rf commands in Step 3, consider backing up your ~/Library/R folder if you've customized your R environment. You can simply copy it to a temporary location like ~/R_backup before running the removal commands. This precaution saves you from losing custom package configurations if you ever need to reinstall R later.

Handle Password Prompts Gracefully: When you encounter the password prompt during Step 3's sudo commands, don't panic if you don't see typing feedback. This is normal macOS behavior—your password is still being processed. Type carefully, then press Enter. For added security, you might want to use your Mac's Keychain to store the password temporarily if you'll be running multiple commands.

Verify with Multiple Commands: In Step 4, don't stop at just which R. After running that, also check with type R and hash -r to clear any cached command locations. I've seen cases where R commands would still appear to work after the initial removal because of these cached paths. The hash -r command forces your shell to forget any previously cached command locations.

Frequently asked questions

Got questions about uninstalling R from your Mac? You’re not alone—here are the most common concerns and their straightforward answers to help you clean up your system smoothly.

Wrapping up and next steps

You’ve made it! Removing R from your Mac—including those stubborn library files—doesn’t have to be a headache. By following the steps above, you’ve cleaned up your system efficiently and freed up space. Whether you’re switching to another tool or just decluttering, you’re now in control of your software environment.

Ready for more? Explore alternative data tools or dive into R’s lightweight alternatives like Python’s pandas or Julia for your next project. Happy coding! 🚀