Ms Office 2019 Mac System Requirements
These are minimum system requirements for installing Microsoft Office 2019 Home and Business for Mac. Processor: Intel processor. Memory: 4 GB RAM. Office Home and Student 2019 is for students and families who want classic Office apps including Word, Excel, and PowerPoint for Windows 10. A one-time purchase installed on 1 PC for use at home or school. Microsoft Office Home & Student 2019 will work only on Windows 10. For other versions of Windows, you have to buy Office 2016.

This guide is intended to help administrators and other IT professionals to plan, implement, and maintain deployments of Office on devices running macOS in their organization.
There are several versions of Office that are referred to in this guide:
Office Requirements For Mac
Office for Mac, which is available with any Microsoft 365 (or Office 365) plan that includes the Office desktop apps. For example, the Microsoft 365 Business Premium plan or the Office 365 E5 plan. This version is updated on a regular basis to provide new features. It also receives security and quality updates, as needed.
Office LTSC for Mac 2021, which is available through a volume licensing agreement. This version receives security and quality updates, as needed.
Office 2019 for Mac, which is available as a one-time purchase from a retail store or through a volume licensing agreement. This version receives security and quality updates, as needed.
Note
Support for Office 2016 for Mac ended on October 13, 2020. For more information, see End of support for Office 2016 for Mac.

This guide covers the following areas:
In addition to this guide, other information is available to help admins with Office for Mac deployments, including the following sites:
Office Home & Student 2016 System Requirements
System requirements for Microsoft 365 and Office, for installation requirements, such as supported operating systems.
Microsoft 365 for Mac, for purchasing information.
Office Help & Training, for help on how to use Office for Mac.