Could you please tell me:
Are you unable to log in to Teams after updating your Mac system?
Are other users in the organization having the same problem?
Can you log in to Teams on the web client?
If you can log in on the web client but not on the local client, try clearing the Teams cache and trying again:
You can also report to specific Outlook for Mac support team who is specialized team for Outlook for Mac related issues and bug report related scenario. This team can further check and make changes for Outlook for Mac for new OS version updates. Here is our official document: Contact support within Outlook for Mac - Microsoft Support .
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