See the Microsoft Support Lifecycle Policy site for supported versions of Exchange Server and SharePoint Server. For the best experience, use the latest version of any operating system. When a new version of MacOS is released, the Office 2019 for Mac Operating System requirement becomes the then-current three most recent versions: the new version of MacOS and the previous versions.
HFS+ hard disk format (also known as macOS Extended or APFS)
Hard disk: 10 GB of available disk space.Computer and processor: A Mac computer with an Intel processor.