I have installed the macOS Mojave public beta and want to grab a copy of the newest beta version for a backup usb drive. I used the Mac App Store link from Apple's public beta page which opens the Mojave page in the new App Store. The download however only opens a small downloader program which directly installs the os rather than downloading the os image. Is there a way to force the App Store to download the full 4.9 GB file?