According to the support center - you need Macintosh OS 10 or greater using Firefox, Microsoft Internet Explorer or Safari. You will need to make sure that you have the latest version of Java installed also (go to www.java.com and see if you have the latest). It is real easy to find out - just click on "Do I have Java?" below the Free Java Download button. It will tell you if you have it installed and if you have the correct version.

If you still have trouble - I can try to walk you through checking everything. Let us know, it costs quite a bit for the software, but if it works for everyone, we are going to buy it.