See https://www.pgadmin.org/download/pgadmin-4-macos/ Since [pgAdmin 4 v6.16](https://www.postgresql.org/ftp/pgadmin/pgadmin4/v6.16/macos/) (released Nov. 19, 2022) the login dialog does not show up. I run MacOS High Sierra version 10.13.6 (17G14042) I can still run pgAdmin 4 v6.15.