To download the app, click the button that shows the price of the app or “Get”. Then click the button again to install or buy the app.
Tip: To see the amount of time left for the download to complete, click the app’s name to view the app’s page. The amount of time appears next to in the Dock to open a Finder window. In the Applications folder, Control-click the app icon, then choose Move to Bin.
On your Mac, choose Apple menu Download and install large apps to a separate disk