This version of Office 2021 for Mac (Preview) is very, very similar to Office 2019 for Mac. Once the installer package is downloaded, internet access is not required to install, activate, or use the software. Office 2021 for Mac (Preview) has native support for both Intel-based Macs and Apple Silicon. Users will need at least 4GB memory and 10GB available disk space. As each new version is released, the oldest of the three will be phased out of support for Office 2021.Īs of April of 2021, the three versions of macOS that are supported with Office 2021 for Mac (Preview) are macOS Big Sur (11), macOS Cataline (10.15), and macOS Mojave (10.14). This new software is supported on the three most recent versions of macOS, and will continue to be supported by the three most recent versions of macOS through the future. Requirements for Office 2021 for Mac are fairly broad.