Hmmm...it's been over a year since I used an AIO. I could have sworn it had a custom video card, so that maybe tricky. I bet if you rewire the cable and have it go into a VGA adapter for Mac displays, you could get it to work through the onboard VGA on a mini ATX board.

At the moment, I'm at work, so I'm unable to verify this.
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MacBook 2GHz Intel Core 2 Duo w/ 2GB DDR2 RAM & 120GB SATA 5400RPM HDD
Canon Rebel XTI
Google Cr-48 Beta Laptop