How do I download OSX from the App Store? The easiest way for Mac users can download and install macOS Sierra 10.12.6 is via the App Store: To download the new OS and install it you’ll need to do the next: Access to the App Store enables you to download Mavericks if your computer meets the requirements. To download apps from the Mac App Store, you need a Mac with OS X 10.6.6 or later.
Mac App Store is the simplest way to find and download apps for your Mac.On the server, install the app named 'Install Mac OS X Lion' from the Mac App Store (a network connection is required for this process). I'm trying to follow the directions on the Apple Support Page regarding Mass Deployment.