There are many alternatives to Postico for Mac if you are looking for a replacement. The best Mac alternative is DBeaver, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 25 alternatives to Postico and many of them are available for Mac so hopefully you can find a suitable replacement. Other interesting Mac alternatives to Postico are DataGrip (Paid), pgAdmin (Free, Open Source), Valentina Studio (Freemium) and Navicat (Paid).
DBeaver - Universal Database Manager and SQL Client. DBeaver is free and open source (GPL) universal database tool for developers and database administrators. Usability is the main goal of this project, program UI is carefully designed and implemented.
TablePlus is a native app which helps you easily edit database data and structure. TablePlus includes many security features to protect your database, including native libssh and TLS to encrypt your connection.
DbVisualizer is the universal database tool for developers, DBAs and analysts. It is the perfect solution since the same tool can be used on all major operating systems accessing a wide range of databases.