Using iMac as monitor for Canon T2i??

Can I use an iMac (a new one) as a monitor for the Canon?

I'm setting up a little on-camera studio for a friend who is working on a long film -- and who has to do on-camera presentations single-handedly over the next year. The camera will be on the desk in front of him, flush with the iMac and pointed back at him. He will be reading text (Pages) on the iMac just behind the camera (in lieu of a teleprompter) -- the tests suggest we'll be able to get away with this. But we need to frame and focus the camera before turning it on. There is an AVI out, and an HDMI out on the camera.

We can't just move the iMac aside while framing and focusing ... we've built a modest sound booth around the whole front end of his edit suite ... so he can do the on-camera, and also voice-overs direct to FCP. The new iMac is quiet enough, very impressive.

Is there any way I can connect the camera to the iMac monitor and use it (to frame and focus) as a slave monitor to the camera? I posted this at iMac ... but suspect there are a lot more filmmakers here at FCP who would be more likely to have an answer...

Ben

Ben