As ie4mac provides you with four different versions of IE (6, 7, 8 and 9), running side by side, you can test HTML and CSS compatibility of your web pages on each version of Internet Explorer and interactively debug AJAX and JS. According the developer, “ie4mac makes this possible by running a cluster of Windows Terminal Servers and delivering the Internet Explorer to your Mac using a protocol called RDP”. ie4mac is not a free application, however, during the beta testing period you can use it for free. All you have to do is enter your e-mail address to get an invitation. More details and download at source.
