Please use New Outlook for Mac.
As of October 2025, the only supported Outlook experience on macOS will be New Outlook for Mac. If you're currently using Legacy Outlook for Mac, you must switch to the new version to ensure continued compatibility and support.
How do I learn about the New Outlook for Mac experience?
How do I switch to the New Outlook experience?
- Open Outlook for Mac.
- Go to the Help menu.
- Select Try the New Outlook (or toggle the switch if available).
Microsoft provides full instructions here: New Outlook for Mac - Microsoft Learn
How do I know if I'm using Legacy Outlook or New Outlook?
- Open Outlook on your Mac.
- In the top menu bar, click Outlook.
- Look for Legacy Outlook in the dropdown:
- If there is a check mark next to “Legacy Outlook” → You are using Legacy Outlook.
- If there is no check mark → You are using the New Outlook
Note: Microsoft has announced that support for Legacy Outlook for Mac will end after October 2025 for all Microsoft 365 accounts. Read the Microsoft announcement: