Modern versions of Microsoft 365 and Office 2019/2021 do not support Mac OS X Lion. You must rely on older, period-correct releases of the productivity suite. Microsoft Office for Mac 2011 (Recommended) : Fully compatible.

Office 2011 does not seamlessly integrate with modern OneDrive (Microsoft 365) accounts.

Download and apply Microsoft Office for Mac 2011 Update 14.7.7 . This is the final version ever released for the 2011 suite, providing maximum stability on OS X Lion. For Office 2008 for Mac:

Because digital downloads are no longer hosted on official Microsoft retail sites, you must use physical media or archived installers. Locate your original Office 2011 or 2008 installer CD.

The base installer for Office 2011 usually installs version 14.0.0. This early version is highly unstable on OS X 10.7.5 and suffers from frequent crashes. To ensure stability, you must update the software to its final, most stable release: .

You need the original ISO or DMG. This is a 1.2GB file. (Verify the SHA-1 checksum if possible to avoid malware).

Do not download individual patches (14.1, 14.2, etc.). Use the (combined package).

Install the patch immediately after installing the base Office 2011 suite. Alternatives to Office 2011 for Mac OS X 10.7.5