I have tried nummerous time to install the macOS High Sierra 10.13 GM candidate on my Late 2014 Mini, and my new iMac, both are running the Developer Beta Version 9. I follow the instructions, "Run the macOS Developer Beta Access Utility to download the latest macOS 10.13 beta. macOS 10.13 GM candidate must be downloaded manually by using the macOS Developer Beta Access Utility and downloading the update from the Mac App Store."
And it goes through the various steps, but it never downloads the GM Candidate, it always reboots in 11 seconds, and that's it.
I con't figure out what's wrong, for I get no error messages.
Thanks,
Tony