If you are running a modern macOS (Big Sur or later), it is recommended to upgrade to a newer version to ensure full compatibility with the latest security standards.
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: Microsoft Office 2016 16.16.5
Fixes common crashes and performance lags, particularly when handling large datasets in Excel or complex layouts in Word. If you are running a modern macOS (Big
Addresses vulnerabilities that could allow remote code execution or unauthorized access via malicious documents. Key Highlights: Fixes common crashes and performance lags,
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.