Enable GPG Mail on macOS Mojave or newer
On macOS Big Sur and Monterey, GPG Mail should automatically be activated. If that did not work or you are still running macOS Mojave, to enable GPG Mail
Mail > Settings > General > Manage Plug-Ins…
- tick checkbox for GPGMailLoader (In case you see more than one
GPGMailLoader, pick the newest one)
Apply and Restart Mail
Now activate your Support Plan in
Mail > Settings > GPG Mail.