OS X

Internet Explorer 6,7, FireFox 2,3,
Safari, Opera
256 MB of free RAM
Hard disk with 50MB free
Windows XP or Vista

FireFox 2,3
256 MB of free RAM
Hard disk with 50MB free

FireFox 2,3, Safari, Camino,
Opera
Mac OS X 10.2 or higher
50MB free disk space

Networking: TCP/IP