This article says that mac books can output a dvi signal the intensity card can read

The Intensity was properly identified by my MacBook Pro, connecting the laptop?s output to the input of the card. Not all systems will be able to drive their external display at these resolutions; for example, our 12″ PowerBook could not output 1080p, interlaced video. Results will depend on the video card in your machine.
http://createdigitalmotion.com/2007/...ink-intensity/