How to make this work? – Number Pad - Wireless Numeric Keypad, Numpad and Mouse Trackpad Review

I should have read the reviews before downloading. Apparently to get this to connect with your mac you need an additional program installed on your computer. But I can't find any easy information about how to get that program. Not worth buying or installing.
Review by jbotfry on Number Pad - Wireless Numeric Keypad, Numpad and Mouse Trackpad.