Outlook Calendar Not Responding 2025 Mac. I'm using a mac (macos big sur version 11.0.1) and using microsoft office 365 (microsoft outlook for mac version 16.43). I'm using a mac (macos big sur version 11.0.1) and using microsoft office 365 (microsoft outlook for mac version 16.43).

Describes an issue that triggers an not responding error or outlook freezes. If you can’t change a calendar or event.