Signcut is available in two ways, a subscription version which requires and internet connection to verify your license and a Dongled version. A dongle is a hardware key that is inserted into a spare USB port on your computer. Signcut will detect the presence of the dongle and will allow the program to be run on anymachine as long as the dongle is present. Unlike the subscription versions a dongled version is a purchase and you are licensed to run Signcut on any machine you want as long as the hardware supports it. The Dongle is cross platform and will allow you to run on both Mac OSX and Windows XP or Vista. Also unlike the subscription version which is limited to 5 transfers you may transfer the dongle between machines as often as you like.