Outlook
Uninstalling Outlook on Mac can feel like digging for buried treasure—except the treasure is all the leftover files that refuse to leave. I’ve helped enough users wrestle with this process to know the right moves make it foolproof in under 15 minutes, not a frustrating hour.
The key isn’t just dragging the app to the Trash; it’s hunting down the hidden caches and preferences that Outlook leaves behind like digital breadcrumbs.
Before you start, back up anything important—emails, contacts, or calendar data—because Outlook’s uninstaller doesn’t always play nice with recovery. You’ll need to close every Outlook window first (no force-quitting—trust me, that’s a headache later), then grab the app from the Applications folder and drag it to the Trash.
But here’s where most guides stop short: the real cleanup happens in Library folders, where Outlook stashes its support files, plugins, and even temporary data. I’ll walk you through the exact folders to scrub, down to the Terminal command that verifies everything’s gone.
By the end, your Mac will be completely free of Outlook’s digital footprint—no lingering processes, no phantom crashes from leftover files.
You’ll even get a sanity check to confirm Outlook isn’t hiding in your LaunchAgents or LoginItems, because nothing’s more frustrating than thinking you’ve uninstalled something only to find it lurking weeks later.
This method works for Outlook 2016, 2019, and the latest Microsoft 365 versions, so no matter which you’re using, we’ll get it done right.
If you hit a snag—like a stuck process or permission errors—I’ve got troubleshooting steps that’ve saved users from bricking their installs. The worst that can happen is a 30-second delay while we reset permissions, and the best?
A Mac that finally feels like Outlook’s never been there at all. Let’s get started.
📚 In This Guide
- What you need
- Instructions
- Tips and common mistakes
- Wrapping up and next steps
What you need
- ● A Mac computer running macOS High Sierra (10.13) or later (Outlook is compatible with these versions).
- ● Your admin credentials—you’ll need these to authorize changes to your system.
- ● Microsoft Outlook installed (obviously!)—the version you’re using (e.g., Outlook for Mac 2016, 2019, or Microsoft 365).
- ○ Optional but helpful: A backup of your Outlook data (emails, contacts, calendars) in case something goes wrong.
- ● A third-party uninstaller tool (like blank">AppCleaner or blank">CleanMyMac) to ensure no leftover files remain.
- ● Your Microsoft account login if you want to deactivate Outlook before uninstalling.
Step-by-Step instructions for removing Outlook from your Mac completely
Here’s how to fully erase Outlook and all its traces from your system—no leftover files or hidden preferences.
Quit Outlook and Locate the Application
First, fully close Outlook by right-clicking its icon in the Dock and selecting Quit. If it’s running in the background, force-quit it by pressing Command + Option + Escape, selecting Outlook, and clicking Force Quit. This ensures no processes interfere with removal.
Next, navigate to your Applications folder in Finder. Locate the Microsoft Outlook application—it’s typically in the main Applications folder or within a Microsoft Office subfolder. Drag it to the Trash bin to remove it from your system.
Delete Remaining Support Files and Preferences
Outlook stores user data and settings in hidden files that don’t disappear when you delete the app. Open Finder and press Command + Shift + G to open the Go to Folder menu. Type ~/Library and press Enter. This opens your hidden Library folder.
Inside, delete these folders one by one: Microsoft, Group Containers (look for any containing UBF8T346G9 or similar Microsoft identifiers), and Preferences (delete any files with com.microsoft in the name). These contain leftover data, caches, and settings that can cause conflicts if left behind.
Remove Microsoft AutoUpdate and Clean Up Cache Files
If you installed Outlook via Microsoft’s AutoUpdate tool, locate it in your Applications folder and drag it to the Trash as well. This ensures no background updates or remnants remain. Then, open Finder again and navigate to /Library/Application Support/Microsoft. Delete the entire Office folder here—this removes shared Office components that Outlook might rely on.
For a thorough cleanup, open Terminal and run these commands one by one to remove any lingering files:
sudo rm -rf /Library/Internet Plug-Ins/Microsoft\ Outlook.plugin
sudo rm -rf /Library/PrivilegedHelperTools/com.microsoft.outlook*
Enter your admin password when prompted. These commands target deep-system files that might persist after a standard uninstall.
Verify Removal and Reboot
After deleting all files, restart your Mac to ensure all processes are fully terminated. Once rebooted, open Finder and press Command + Shift + G again. Navigate to ~/Library and confirm that the Microsoft, Group Containers, and Preferences folders no longer contain Outlook-related files.
To double-check, launch Spotlight (press Command + Space) and search for Outlook. No applications, plugins, or files should appear. If any remnants remain, repeat the deletion process for those specific folders or files.
Tips & tricks for completely removing Outlook from your Mac
This isn't just about deleting an app—it's about ensuring Outlook leaves no digital footprint behind. Here's what I've learned from years of troubleshooting stubborn software remnants.
Double-Check Running Processes: Before you begin, open Activity Monitor (Applications > Utilities) and search for any Outlook-related processes. You might find hidden services like "Microsoft Outlook Helper" still running in the background. Terminating these before Step 1 prevents conflicts during removal.
Hidden Files Are the Real Challenge: In Step 2, don't stop at just the Microsoft folder in your Library. Some users miss the ~/Library/Containers folder which might contain Outlook's containerized components. Search for any folders with "com.microsoft.outlook" in their name and delete them completely.
Terminal Commands Require Care: When running those Terminal commands in Step 3, pay close attention to the exact syntax. The backslashes in "Microsoft\ Outlook.plugin" are crucial—they prevent the shell from interpreting the space as a command separator. If you omit them, the command might fail silently, leaving remnants behind.
Post-Reboot Verification is Critical: After your reboot in Step 4, don't just trust Spotlight. Some hidden launch agents might still trigger Outlook at login. Open System Preferences > Users & Groups > Login Items and remove any Outlook-related entries you find there.
Pro Tips for Uninstall Outlook On Mac
- This isn't just about deleting an app—it's about ensuring Outlook leaves no digital footprint behind.
- Double-Check Running Processes: Before you begin, open Activity Monitor (Applications > Utilities) and search for any Outlook-related processes.
- Hidden Files Are the Real Challenge: In Step 2, don't stop at just the Microsoft folder in your Library.
Frequently asked questions
Got questions about removing Outlook from your Mac? You’re not alone! Here are some common concerns—and quick answers—to help you uninstall smoothly.
Will uninstalling Outlook delete my emails and contacts?
Nope! Uninstalling Outlook only removes the app—your emails, contacts, and calendar data stay safe. Just ensure you’ve backed them up to OneDrive, iCloud, or another storage service before proceeding. Outlook’s data lives in your ~/Library/Group Containers/ folder, so it won’t vanish with the app.
How long does it take to fully uninstall Outlook?
Uninstalling Outlook itself takes under 5 minutes, but thorough cleanup (deleting leftover files) can add 5–10 minutes. Use a tool like AppCleaner to speed it up. Pro tip: Restart your Mac afterward to ensure all traces are gone.
Can I switch to Apple Mail or another email app after uninstalling?
Outlook’s removal won’t block other email apps. Just re-add your accounts (e.g., Gmail, Outlook.com, or Exchange) in Apple Mail or third-party apps like Spark or Thunderbird. Your email provider’s settings will guide you through setup.
Why does Outlook keep reappearing after uninstall?
This usually happens if Outlook’s auto-update or login items are still active. Check System Settings > General > Login Items and remove Outlook. Also, scan for leftover files in ~/Library/Application Support/Microsoft/ and ~/Library/Containers/.
Do I need admin rights to uninstall Outlook?
Yes! Outlook requires administrator privileges to remove. If you’re on a shared Mac, ask the admin for help or use macOS’s built-in uninstaller (located in Outlook’s Applications folder). No admin access? Try drag-and-drop deletion to the Trash first.
Wrapping up and next steps
Uninstalling Outlook from your Mac doesn’t have to be a hassle—whether you’re switching to another email client or simply decluttering your system, following these steps ensures a clean removal.
By using Outlook’s built-in uninstaller, macOS’s built-in tools, and manual cleanup, you can bid farewell to leftover files and free up space with confidence. 🎉
Ready to streamline your workflow? Now that Outlook is gone, take the next step by exploring alternative email apps or optimizing your Mac’s performance for a smoother experience. You’ve got this! ✨