Microsoft Teams not loading or signing in on Mac OS Tahoe

Question

Hello, I am using MacOS Tahoe and Microsoft Teams currently version 26059.604.4471.2584. I cannot load teams. Teams continues to crash or shows a blank screen. I have restarted and cleared app cache. Any ideas?

Answer 1

Dear @TJohnson,

Good day, and I appreciate the detailed description of your issue. 

From my research, this issue is fairly common on macOS Tahoe due to WebKit/Safari rendering changes, corrupted cache, or authentication/token problems after OS updates. Since a basic restart and cache clear did not resolve the problem, a deeper cleanup is likely required. Please try the steps below to see if they help.

1.Perform a full Microsoft Teams cache removal

Quit Teams completely (right-click Dock icon > Quit, or Force Quit via Cmd + Option + Esc).

Open Terminal (Spotlight search: Terminal) and run these commands one by one (press Enter after each; you'll be prompted for your password):

rm -rf ~/Library/Application\ Support/Microsoft/Teams

rm -rf ~/Library/Caches/com.microsoft.teams

rm -rf ~/Library/Caches/com.microsoft.teams2

rm -rf ~/Library/Containers/com.microsoft.teams2 rm -rf ~/Library/Group\ Containers/UBF8T346G9.com.microsoft.teams

After running them, restart your Mac, then reopen Teams and try signing in.

Note: Some users see "Operation not permitted", in that case, try the commands with sudo at the front, or delete the folders manually via Finder (Go > Go to Folder, paste the paths, and delete contents or the folders).

2.Clear Microsoft credentials from Keychain Access

• Open Keychain Access (Spotlight search).
• In the left sidebar, select login keychain.
• In the search bar (top right), type: teams, microsoft, office, adal, oneauth, or your work email.
• Delete all matching items (right-click > Delete). Also check the System keychain if needed.
• Restart your Mac, then try Teams again.

3.Full Clean Reinstall

1. Quit Teams.
2. Drag the Microsoft Teams app from Applications folder to Trash.
3. Delete the cache folders again using the Terminal commands above (or Finder).
4. Empty Trash.
5. Restart your Mac.
6. Download the latest Teams directly from Microsoft
7. Install and sign in.

I hope this information is helpful. Please follow these steps and let me know if it works for you. If not, we can work together to resolve this. Thank you for your patience and understanding. If you have any questions or need further assistance, please feel free to share them in the comments so I can continue to support you. I'm looking forward to your reply.

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Answer 2

Use the following steps on macOS to troubleshoot Teams not loading, crashing, or showing a blank screen.

1. Fully quit Teams

• Right-click the Teams icon in the Dock and select Quit, or press Command (⌘)+Q.

2. Clear the Teams cache (new Teams for macOS) Since the cache was already cleared once, ensure it was done using the current method for new Teams:
3. Open Finder > Applications > Utilities > Terminal.
4. Run these commands (press Return after each):

      rm -rf ~/Library/Group\ Containers/UBF8T346G9.com.microsoft.teams
      rm -rf ~/Library/Containers/com.microsoft.teams2
   

5. Restart Teams and sign in again.

If using classic Teams instead of new Teams, clear this folder instead:

1. Quit Teams.
2. In Terminal, run:

      rm -r ~/Library/Application\ Support/Microsoft/Teams
   

3. Restart Teams.
4. Check network access to Teams If Teams opens a blank window and then disappears or never loads content, network configuration may be blocking Teams endpoints. An admin should:

• Review firewall/proxy settings and ensure all Teams endpoints are allowed.
• Ensure Teams-related network requests are not being filtered or timed out.

4. Verify OS support If the macOS version is not supported, Teams can fail to launch correctly. Confirm the device is on a macOS version supported by the Teams client. If not, update macOS to a supported version.
5. If the issue persists If Teams still crashes or only shows a blank screen after cache clear, network verification, and OS check, an admin should:

• Use the Teams client health dashboard (when available) to see if the issue is categorized as a Launch failure and review the Insight column for the affected device.
• If no resolution works, contact Microsoft Support with details of the crash behavior.

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References:

• Clear the Teams client cache
• I can't reconnect to Microsoft Teams
• Resolve Teams client launch failures