How to Uninstall Outlook on Mac: Step-by-Step Removal Without Lingering Files

Uninstalling Outlook on Mac shouldn’t leave behind a digital mess—here’s how to scrub it clean. ✨ I’ve helped dozens of users remove Microsoft’s email client without missing a beat, and the key is knowing where Outlook hides its files.

The process takes about 10 minutes if you follow the right steps, but skipping one can leave behind cached emails or preference files that respawn the app.

First, back up your Outlook data if you plan to reinstall later—drag your mailboxes to a folder or export to a .pst file. Then, quit Outlook completely (right-click its dock icon and select Quit).

For the actual removal, you’ve got two solid paths: the built-in macOS method (Finder/Launchpad) or a deeper clean with a tool like AppCleaner. I’ll walk you through both, plus how to verify nothing’s left behind.

After uninstalling, check three critical spots: your Applications folder, the Library folder (especially Containers and Group Containers), and hidden preference files. A quick Terminal command—rm -rf ~/Library/Containers/com.microsoft.Outlook—handles the stubborn bits.

Trust me, skipping this step means Outlook might still lurk in your system preferences, ready to reappear when you least expect it.

If you run into permission issues or stuck processes, don’t panic—macOS has safeguards. We’ll cover how to force-close lingering Outlook tasks and reset permissions so your next app install goes smoothly.

By the end, your Mac will be Outlook-free, and you’ll know exactly where to look if anything sneaks back in.

What you need

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

Here's the foolproof method I use to cleanly remove Outlook and all its leftover files.

First, fully quit Outlook by right-clicking its icon in the Dock and selecting Quit. If it's running in the background, open Activity Monitor (Applications > Utilities), find Microsoft Outlook in the list, and click the Quit Process button. This ensures no data conflicts during removal.

Next, navigate to your Applications folder and drag the Microsoft Outlook application to the Trash. Empty the Trash immediately to complete the basic uninstall. I always do this first—it's the simplest part, but missing it means Outlook can still launch from remnants.

Outlook leaves behind preference files and caches that can cause issues. Open Finder and press Command + Shift + G to open the Go to Folder menu. Type in ~/Library/ (note the tilde) and press Enter. This reveals hidden system files.

Inside the Library folder, delete these specific folders if they exist:

• Microsoft (contains Outlook's core support files)
• Containers/com.microsoft.outlook (modern app sandbox data)
• Preferences/com.microsoft.Outlook.plist (user settings)

Hold Command while dragging files to Trash to bypass permission warnings. This step ensures Outlook won't restore your old settings or cache on next launch.

Outlook also stores data in system-wide locations. Open Finder again and navigate to /Library/ (the system Library, not your user Library). Delete these folders if present:

• Microsoft (system-wide Outlook data)
• Preferences/com.microsoft.Outlook.plist (global settings)

You'll need admin privileges—enter your password when prompted. This final cleanup prevents Outlook from re-registering system components on future launches.

Reboot your Mac to ensure all Outlook processes are terminated. After restarting, open Finder and press Command + Shift + G again, then type ~/Library/. Check that the Microsoft folder is gone—if it reappears, you missed some files.

To reclaim space, right-click your Mac's startup disk in Finder and select Get Info. Under Finder, enable Show these items on the desktop for Hard disks and External disks, then click the disk name to open it. Run Optimize Storage in System Settings > General > Storage to clean up temporary files left behind.

Tips & tricks for completely removing Outlook from your Mac

These pro tips will help you avoid the most common pitfalls when uninstalling Outlook—trust me, I've seen what happens when you miss even one step.

Backup First: Before you delete anything, create a backup of your Outlook data. Open Outlook, go to File > Open and Export > Import/Export, and export your emails, contacts, and calendar to a PST file. Store this backup externally—you never know when you might need to restore something. This is the one step I skipped my first time, and I regretted it when I accidentally deleted important emails.

Use Spotlight for Hidden Files: Instead of manually searching for hidden files, use Spotlight Search (press Command + Space) and type ~/Library. This opens the hidden Library folder directly, saving you time and frustration. For system-wide files, type /Library—this ensures you don't miss anything in Step 3. I learned this trick when I spent 20 minutes searching for the Microsoft folder manually.

Double-Check for Remnants: After rebooting in Step 4, open Activity Monitor again and search for any lingering Outlook processes. If you see anything related to Microsoft or Outlook, force quit it immediately. Also, check your Login Items in System Settings > General > Login Items to ensure Outlook isn't set to launch automatically on startup. This final check saved me from a headache when Outlook kept reappearing after what I thought was a complete uninstall.

Optional: Use a Third-Party Uninstaller: If you're feeling overwhelmed, consider using a third-party uninstaller like AppCleaner or CleanMyMac. These tools can scan for and remove all remnants of Outlook in one go. Just be sure to verify the removal manually afterward—no tool is perfect. I've used AppCleaner for stubborn apps, and it's saved me time, but I always double-check.

Frequently asked questions

Got questions about uninstalling Outlook on Mac? You’re not alone! Here are some of the most common concerns—plus quick, clear answers to keep things smooth.