Port Authority 1.0 is an open-source application that provides a graphical user interface for the DarwinPorts package management system for Mac OS X. It is a command-line tool for installing and updating a variety of Unix-based applications for the Mac. Port Authority aims to bring the power of DarwinPorts to the traditional Mac user by providing a user-friendly graphical interface to the DarwinPorts system, notes the company. Port Authority 1.0 is priced at US$6.25.