I tried using and liking pgAdmin 4 beta for a few months. Even simple things like copy-paste from clipboard using Cmd-C/V, exporting/importing data to/from my local machine, etc were a hassle. Add to that the slow startup, sluggishness, and poor UX. I'm happily using Valentina Studio now. A small data point for others who may come to this thread looking for PostgreSQL GUI tools.