From gbox.com home page (local machine : osx firefox 2): "Hey, you need to be on a Windows machine and use Internet Explorer 6, Internet Explorer 7, or Firefox

From gbox.com home page (local machine : osx firefox 2): "Hey, you need to be on a Windows machine and use Internet Explorer 6, Internet Explorer 7, or Firefox 2.0 to get the full gBox experience. We are working hard to support Mac and Linux users, but it will take some time. Big apologies for the inconvenience."