Steve on 02 Aug, 2018 07:10 PM
welcome to the GPGTools support platform. Sorry you are having problems using GPG Suite.
This KB-article elaborates on why GPGMail may not work with unreleased macOS major updates and what to do if you cannot revert to a stable macOS release.
We have a ticket for this problem. I connected this discussion with the existing ticket. That means, should this discussion get closed, it will be re-opened as soon as the ticket is closed. That way you'll stay in the loop and get notified as soon as we have news. Feel free to open a new discussions should you run into further problems or need assistance.
Disclaimer: Please note that there is no official support for macOS pre-release versions. Should you rely on GPGMail for your productive work, please stick to the stable release channel of macOS.