Users need to update to macOS 10.12 or higher to get the latest version of Office.
Microsoft shared a preview of Office 2019 for Mac in July, and now, they announced that new updates of Office 365 will all be available as long as the system is macOS Sierra or higher.
Microsoft specifically explained in a blog post that users will have to at least update to macOS Sierra 10.12 to get the latest functions from Office 365/Office 2019 for Mac this month. Read More