Postgres.app is not a package manager. If you pin Postgres in brew, not installing `postgres` but instead `postgres@11.3` instead, then you won't have any auto

Postgres.app is not a package manager. If you pin Postgres in brew, not installing `postgres` but instead `postgres@11.3` instead, then you won't have any auto upgrade issues. You can then upgrade on your own schedule. Brew will keep Postgres at your selected version.