The transition to Lion (10.7) was a double-edged sword. While it supported Office 2011 and Office 2008, it marked the end of the emulation layer.
Known issues with Office for Mac on macOS 10.7 (Lion) and Higher Microsoft Office For Mac Os X Lion 10.7.5
Because Lion and Office 2011 are (no security updates since ~2017): The transition to Lion (10
: If installing Office 2011, ensure you download Service Pack 1 (14.1.0) or later from the Microsoft Support site to ensure full compatibility with Lion. Microsoft Office For Mac Os X Lion 10.7.5
Performance:
⚠️ Activation servers for Office 2011 may still work , but Microsoft could shut them down anytime. Have your 25-character product key ready.