Teams on Mac is freezing constantly.

Teams freezing on macOS in this scenario isn’t listed as a specific known issue in the provided context, but there are several supported remediation steps that often resolve client instability on Mac:

1. Clear the Teams cache specifically for macOS (New Teams) Since the user is on the new Teams client and cache clearing was already attempted, confirm it was done using the current macOS paths:

1. Quit Teams completely (right‑click Teams in the dock > Quit, or press Command (⌘)+Q).
2. Open Finder > /Applications/Utilities > Terminal.
3. Run these commands, pressing Return after each:

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

4. Restart Teams and sign in again.

This removes all local Teams data for the new client and forces a clean rebuild of the profile and cache.

2. Check for OS support and update macOS Unstable behavior can occur on unsupported OS versions. Verify the Mac is running a version of macOS that is supported for the new Teams client and update macOS if needed, as per the Teams client system requirements referenced in the launch‑failure guidance.
3. Treat repeated freezes as a “client crash” scenario The Teams client‑health guidance for crash issues recommends:

• Ensuring that any antivirus or DLP tools on the Mac are not blocking or interfering with Teams or the embedded WebView2/underlying web stack.
• Keeping audio and video drivers (and any virtual audio/video components) fully updated, as media stack failures can cause instability.

If any third‑party security or monitoring tools are installed on the Mac, configure them to include/allow the Teams desktop client and its supporting processes.

4. Full reinstall of Teams on macOS If cache reset and OS/driver checks do not help, perform a full reinstall of Teams on the Mac:

1. Quit Teams.
2. Remove the Teams app from /Applications.
3. Remove the same cache folders as in step 1.
4. Reinstall the latest Teams client for Mac and test again.

5. If the issue persists If freezes continue after:

• Full macOS‑style cache removal,
• OS and driver updates,
• Validation that security/DLP tools are not interfering,
• Full reinstall of Teams,

then treat it as a persistent client‑crash/instability issue and escalate via Microsoft Support with logs from the affected Mac, as recommended in the client‑health articles.

References:

• Clear the Teams client cache
• Resolve Teams client launch failures
• Resolve Teams "client crash" issues
• When I try to open Teams meetings from a link in my Google Calendar, the meeting never loads. - Microsoft Q&A
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Hello @John Flaherty

Currently, I have found any report regarding this issue so I suggest that you can try to simple troubleshoot step

Reinstall MS Teams For Mac

As a last resort, you can uninstall Teams entirely, then reinstall it.

Uninstall Microsoft Teams

• Open Finder
• Go to Applications
• Find Microsoft Teams
• Control‑click Microsoft Teams
• Select Move to Bin / Move to Trash

Download Microsoft Teams Again

• Open a web browser
• Go to the Microsoft Teams official download page
• Click Download
• Wait for the installer to finish downloading

If you still need my assistance, please come back with screenshots or any additional details so I can review it again and see if there’s anything more I can help you with.  

Have a nice day!  

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