SequelPro is incredible - easy to use, beautiful, reliable, powerful - but it only works with MySQL (or MariaDB). I've tried Toad but it's very buggy and ugly. The AppStore has SQLPro for Postgres, but I've not heard any reviews, so I'm reticent to spend $30. I've used a Navicat trial for MySQL and it was good but costs around $200.
+1 for PGAdmin. I've been using it for several weeks and it's been pretty good, although it does have a couple of flaws. One of them appears to be an OSX issue, though, where opening tables sometimes throws part of the window (the top bar) outside of the screen (and the only way I've found to fix it is to click on Window > Zoom).
I recently bought a license to Postico (https://eggerapps.at/postico/) which is the successor to PG Commander. Switched from pgAdmin which is functional, but Postico's UI is nicer.
JetBrains' DataGrip (or any of their IDE's if you have them) is really nice, I've been using it in tandem with PgAdmin (for general maintenance tasks since it has a GUI for some common stuff like permissions).
I'm experimenting with https://eggerapps.at/postico/ currently and it's pretty nice. Fairly similar to Sequel Pro in a lot of ways (which I miss too when in Postgres-world).
I recommend and use sqlworkbench, which is great as long as you don't work for one of the govts disallowed by the license (which is apache otherwise) http://www.sql-workbench.net/
SequelPro is incredible - easy to use, beautiful, reliable, powerful - but it only works with MySQL (or MariaDB). I've tried Toad but it's very buggy and ugly. The AppStore has SQLPro for Postgres, but I've not heard any reviews, so I'm reticent to spend $30. I've used a Navicat trial for MySQL and it was good but costs around $200.