Navicat version 7 is a major new version with more than 100 significant improvements and many new features.
To check out details, please see a release notes at: http://pgsql.navicat.com/release_notes_mac.html.

The Latest 7.1.1 version includes 3 major enhancements:
    1) Ability to stop while establishing connection to PostgreSQL server
    2) Better handling when SSH connection is lost.
    3) Now client_encoding variable is always set to UTF-8

Please feel free to download at: http://pgsql.navicat.com/download.html
 
To find out more details about the product, please visit at: http://pgsql.navicat.com/mac_detail.html
 
Navicat for MySQL can be found at: http://www.navicat.com/mac_detail.html