The native Safari browser on OS X Lion is too outdated to load these modern web apps. You must install a compatible, backported third-party browser such as Chromium Legacy or Pale Moon to access cloud services safely. Legacy Open-Source Desktop Alternatives
⚠️ Warning: Activation may fail in 2021 because Microsoft’s legacy activation servers for Office 2011 have been sporadically shut down.
Apple transitioned macOS to be fully 64-bit starting with macOS Catalina (10.15). Office 2021 is a 64-bit application. While 64-bit applications are generally designed to be backwards compatible, the underlying frameworks they depend on are not present in OS X Lion, which had a mixed 32/64-bit environment. microsoft office for mac os x lion 1075 2021
A quick check revealed that his MacBook Pro could run Mac OS X High Sierra, but not the latest Mojave or Catalina versions. John decided to upgrade to High Sierra, which would allow him to install a compatible version of Microsoft Office.
If you'd like, I can help you find more specific resources for your Mac by knowing: Is your Mac an ? How much RAM does it currently have? The native Safari browser on OS X Lion
If your Mac has legacy versions of Pages, Numbers, and Keynote installed, these tools can export documents directly into Microsoft Office formats.
If you actually have Lion 10.7.5, the last compatible Office version is or Office 2016 (partial support, but 2016 requires 10.10+ generally). Apple transitioned macOS to be fully 64-bit starting
: This specific older release of LibreOffice is fully compatible with Lion and offers robust .docx and .xlsx file editing capabilities.
You can use Word, Excel, and PowerPoint in a browser, though Lion's older versions of Safari or Chrome may struggle with modern web standards. Using a lightweight, legacy-supported browser like Waterfox or Pale Moon may improve the experience. Modern Office Requirements
Keep a copy of Office_2011_14.7.7.dmg and your product key. It remains a masterpiece of software compatibility — one of the longest-supported Office suites for a single macOS version. But as of 2021, it is a museum piece.