How to Uninstall R on Mac: Fully Remove Packages and Cache Files

Uninstalling R on your Mac isn’t as simple as dragging it to the trash—leftover files can haunt your system. ⚡ I’ve seen R’s hidden caches slow down fresh installs more times than I can count, and I’ve learned the hard way which files actually need to go.

The key is knowing where R hides its traces, from system libraries to user package caches.

You’ll need Terminal for the heavy lifting, but don’t worry—we’ll break it down step by step. Start by quitting RStudio or R completely, then use brew uninstall if you installed via Homebrew, or manually delete the app from /Applications.

The real cleanup happens when we target /Library/Frameworks/R.framework and ~/Library/R, where R stores packages and configurations that persist even after uninstall.

Once you’ve removed the core files, verify the job’s done by checking for leftover processes with ps aux | grep R—if anything’s still running, force-quit it. The goal is a completely clean slate, so we’ll also clear environment variables and cached package indices.

This isn’t just about freeing up space; it’s about ensuring your next R install starts fresh, without legacy conflicts dragging it down.

Fair warning: some files resist deletion due to permissions. If you hit a wall, we’ll troubleshoot with sudo commands—but use them carefully. I’ve seen users accidentally remove critical system files when they’re not paying attention, so we’ll walk through each step with safeguards.

By the end, your Mac will be R-free, and you’ll know exactly where to look if you ever need to reinstall.

What you need

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

Here's the clean, thorough way to purge R and all its leftover files—no traces remain.

First, close any open R sessions completely. You can do this by right-clicking the R icon in your Dock and selecting Quit R. If RStudio is running, close it first—it often keeps R processes active in the background. This prevents file locks that could interfere with deletion.

Open Activity Monitor (Applications > Utilities) and look for any lingering processes named R, Rscript, or RStudio. Select each and click the Quit Process button. This ensures no background processes are holding onto files we need to delete.

Navigate to your Applications folder and drag both R and RStudio (if installed) to the Trash. Empty the Trash immediately afterward to permanently remove these files from your system. This handles the main application files but leaves behind configuration and cache files.

For the command-line version, open Terminal and run these commands to remove R completely: sudo rm -rf /Library/Frameworks/R.framework sudo rm -rf /usr/local/bin/R Verify the removal by checking these locations—if they're gone, you've successfully deleted the core R installation.

R stores user-specific files in your home directory. Open Terminal and run: rm -rf ~/.R rm -rf ~/.RData rm -rf ~/.Rapp.history rm -rf ~/Library/R These commands remove your workspace, package libraries, and application history. Be careful—this deletes all your R-specific settings and cached data.

For system-wide caches, run: sudo rm -rf /Library/Caches/org.r-project.R This clears any system-level caches that might persist after uninstalling R.

Restart your Mac to ensure all processes have fully terminated. After reboot, open Terminal and run: which R If the command returns nothing, R is completely removed from your system path. You can also check for any remaining files by searching: sudo find / -name "_R_" 2>/dev/null This will list any leftover R-related files that need manual deletion.

For a final check, try launching R from Terminal with R. If you see "command not found," you've successfully removed R entirely. No traces remain in your Applications, system files, or user directories.

Tips & tricks for fully removing R from your Mac

Real talk: Even after dragging R to the trash, you'll still find remnants lurking in your system. These tricks ensure you get every last trace of R—no surprises later when you try to reinstall something else.

Processes First: I learned this the hard way after reinstalling R only to find it launching automatically from background processes. Always double-check Activity Monitor for Rscript or RStudio processes—even if you quit them normally, they sometimes stick around. Between us, I've seen R processes hide for hours after "quitting," so give it a thorough scan before proceeding.

Command-Line Double-Check: The terminal commands in Step 2 and 3 are your best defense, but here's what nobody tells you—some R installations create hidden symlinks. After running those commands, verify with ls -la /Library/Frameworks/ and ls -la /usr/local/bin/ to confirm nothing suspicious remains. I've caught leftover symlinks that would've caused issues later.

Backup Critical Data: The commands in Step 3 wipe your R workspace and package libraries. If you've got important RData files or custom scripts, back them up first to ~/Documents/R_backup before running the deletion commands. I've seen people lose years' worth of analysis data because they skipped this step.

Admin Privileges: You'll need your admin password for the sudo commands, but here's the thing—some Macs have parental controls or permission restrictions that might block these operations. If you get permission denied errors, try running Terminal as administrator (right-click > Run as administrator) before attempting the sudo commands again.

Frequently asked questions

Wrapping up and next steps

Uninstalling R from your Mac doesn’t have to be a hassle—whether you’re freeing up space, troubleshooting, or simply starting fresh. By following the steps above, you’ve now fully removed R, its packages, and leftover cache files while keeping your system clean and clutter-free. 🎉

You’ve taken control of your Mac’s storage and software—great job! For a smoother experience next time, consider documenting the version you’re installing or exploring lightweight alternatives like RStudio Server if you plan to return to R later. Happy computing! 🚀