I've checked the official website and it's said that with the package you also receive the Mac software. Therefore, insert the CD and browse it instead of launching the automatic installer. The Mac application should be there as well. If you can't find it, then it means you've probably purchased a version of the software that didn't had the Mac package. You could try using Wine Bottler to run the application on Mac even if it's for Windows, but I doubt that it will work perfectly.
Try contacting the seller and explain the situation. Open a ticket on the following website: http://support.clearclicksoftware.com/support/tickets/new