Telpay for Business will run only in a Microsoft Windows environment. In order to run Telpay for Business on a Mac, you must first install a software package such as Parallels Desktop or VMWare Fusion.
http://www.parallels.com/ca/products/desktop/
http://www.vmware.com/products/fusion
This software will allow you to install a copy of Windows within the Mac Operating System. You will need to have to purchase a licenced copy of Microsoft Windows. Once Windows is installed on the Mac, you can then install Telpay for Business within the Windows Operating System.