The product is available for Windows operating systems only. To run the application Mac environment, you will need to use virtualization software like Parallels Desktop to emulate a Windows operating system. The emulated Windows OS will run in a window above your desktop so you'll act like you will be on a computer running Windows. You will also need a Windows installation CD for this to work because you will actually install Windows in a virtual file.
You can obtain a copy of the Parallels Desktop software from the Mac.Informer section of the website.