Windows Server 2019 Essentials can only work for Windows, not for Mac! The key will be sent via eMail. Please check the spam or junk mail folder too. Product Description Microsoft Windows Server 2019 Essentials is a cloud-compatible operating system that is powerful enough to support the workload of up to 25 users and 50 devices. The operating system includes everything your business needs to run smoothly and is available at a price-point that is more accessible to small businesses. The Essentials Server 2019 package includes all of the best features from the full Windows Server 2019 so small businesses can successfully compete in todays economy. It's an excellent choice for customers looking to upgrade from the Foundation edition, which is not available for Windows Server 2019. The system brings great new layers of security to the table and possesses Azure-inspired innovation for the applications and infrastructure that can transform the way you do business. Key Features: