I have idle daydreams where Sequel Pro is finally ported to Postgres. pgAdmin is horrendous.
That would be amazing. Sequel Pro makes MySQL management so easy. Have you emailed the author asking for that feature?
Edit: It seems they are working on it but I i'm not sure when we can expect a release: http://stuconnolly.com/blog/sequel-pro-postgresql-support/
I've used Sequel Pro and I don't understand why others love it; it's as clunky as anything I've ever used. My preference is for SQLyog - and my dream is that to be ported to OSX...
That article is from September of 2012.
I've had better luck learning how to use the psql command/shell than mess with pgAdmin, at least in certain cases. To take your example of displaying tables, psql in and type: \dt
The rest is just a search away.