Optimized for older macOS versions (like Sierra and High Sierra) that may not support newer Office 365 versions.
As part of the "16.16.x" branch, this version represents the end-of-life cycle for the 2016 perpetual license before Microsoft shifted focus entirely to Office 2019 and Microsoft 365. Microsoft Office 2016 16.16.5
This update, released on December 11, 2018, is part of the final series of security and bug-fix cycles for the Office 2016 suite on macOS. While it doesn’t introduce new features, it provides essential stability and security patches for Word, Excel, PowerPoint, and Outlook. Key Highlights: Optimized for older macOS versions (like Sierra and