Look for used, official retail boxed copies (CD/DVDs) on e-commerce platforms like eBay or Amazon. Ensure the listing includes a valid, unused, or transferable Product Key.

By understanding the available alternatives, users of OS X Lion can make an informed decision and continue to maintain a productive workflow in 2021 and beyond.

The last version of Microsoft Office officially compatible with Mac OS X Lion (10.7.5) is Microsoft Office 2011 (specifically version Why it works:

Are you facing a specific during installation or activation?

: This is a powerful, free, open-source alternative to Microsoft Office. Older versions of LibreOffice are often compatible with legacy macOS systems and can open/save standard Microsoft Office file formats.

Free versions of Word and Excel accessible via a browser.

Many Macs running 10.7.5 can officially upgrade to OS X 10.11 (El Capitan) or macOS 10.13 (High Sierra) for free via the Mac App Store.

Since Microsoft no longer sells Office 2011 directly, you have to look toward third-party sources or existing subscriptions: How can I get Office on my old Mac OS X Version 10.7.5