The TimeTTracker MX2 is an old and unsupported version. Because of that, you can't actually buy it. I've searched the web and managed to visit the official website, but the problem is with the software availability. The developers have another application available called Objectivity (Mac compatibility). I've looked through the website, but I didn't find anything related to TimeTTracker MX2 therefore, you will have to get in touch with the developers.