Microsoft Office 2021 is not compatible with Mac OS X Lion 10.7.5
As of 2021, Microsoft Office for Mac is part of the Microsoft 365 ecosystem, which offers a range of cloud-based services, including:
Microsoft Office for Mac OS X Lion 10.7.5: A Comprehensive Guide (2021) microsoft office for mac os x lion 1075 2021
Performance: On hardware contemporary to Lion, Office 2011 is generally described as "snappy" and reliable for standard tasks like word processing and basic spreadsheets.
Office 2016 and Newer: These versions (including Office 2019 and 2021) require at least macOS 10.10 (Yosemite) or much higher. For example, Office 2021 typically requires one of the three most recent macOS versions. How to Get Office 2011 in 2021 Microsoft Office 2021 is not compatible with Mac
Mark was a digital archivist, a profession that essentially meant he was a glorified hoarder with a technical degree. His latest acquisition, found at a garage sale in the suburbs, sat on his desk: a heavy, 2011 iMac. It was the model with the aluminum unibody and the super-thin profile that had made jaws drop a decade prior.
The final version of Microsoft Office compatible with Mac OS X Lion is Office for Mac 2011 (version 14.7.7). Consider using older Office installers obtained from trusted
Microsoft Office for Mac 2011: This is the final version of Office that officially supports OS X 10.7.5. While it is no longer officially supported with security updates (support ended in 2017), the applications will still function if you can find a legitimate installer and license.