Steve on 27 May, 2019 03:22 PM
welcome to the GPGTools support platform. Sorry you are having problems using GPG Suite.
There is no "automatic" sync. This KB-article explains how to backup keys or your entire .gnupg folder. It also explains how to transfer keys from one mac to a second mac if you want to use the same keys on more than a single machine.
Let me know if you have more questions or need further assistance after going through that KB.