A back end change to the Mac App Store appears to have shut out users of macOS Sierra and older versions, blocking not just purchases, but also downloads of software already bought.
Apple Explained on MSN13d
History of Mac OS
This video uses footage from The SFC Group: / @keynimationbysavvysage The Mac operating system has changed dramatically from ...
Mac users running macOS Mojave (10.14) and earlier versions are reporting widespread issues accessing the Mac App Store, with ...
Be aware that any spaces will need to be preceded by a backslash. For example, "Install macOS High Sierra.app" would become Once you hit Enter, you'll need to enter your admin password to approve ...
Then you need to decide where the automated test is going to be executed. Safari driver supports the following target platforms: macOS (High Sierra or newer) iOS Simulator (iOS version 13 or newer) ...