Is this even possible?
Yes, but only with the 27" iMacs. Your MBP also has to have a mini display port output. Though I'm sure you can get an adapter if you have an older with DVI.
OK. Good to know. So how does this work? What connects to what?
miniDP to miniDP
I was actually considering this as well. You do know that your iMac needs to be on, even though you're only using it as a monitor by-pass, right? Seemed like an awful waste. I just ended up getting a 24" ACD.
Quite a bit different solution from what you were initially looking at, but the most important thing is that you found something you're happy with.
And this will ONLY work with the 27"?
I ask because I'm about to get a MBP and wanted to dual-screen with my 24" 2009 imac. Will this not work?![]()
I don't believe you can do this with a 24" iMac. It was only the latest models (21.5" and 27") that can function as monitors for another computer.