Depending on whether you are using Catalina, Mojave, High Sierra or another version of macOS, you will either see Software Update prompting you to download the Public Beta, or the Mac App Store.
If you require a beta seed, you’ll need to install the Beta Access Utility before beginning, which can be downloaded from the Apple Developer portal, or the Public Beta webpage.
1) If you don’t already have the Install macOS Mojave application, download it via the Mac App Store.
