What adapter would I need to be able to use my Cintiq 13hd with my MacBook plus display screen

hi there,

i have recently bought a Cintiq 13HD graphic tablet and i have A macbook Pro laptop and a cinema display screen, but at the moment I can only use my laptop with it as i need another adapter to allow ny big screen to work. The cintiq has a mini display port cord and so does my screen so Does anyone know what I need to buy for this screen to work as well?