Does AC work on Mac's and if so, how do you install?
The easy way is to run AC in a remote session on a Mac, up in seconds.
If you want to use the Macs for charting, you might still want to think about a W7 machine for the 'server'. You could then use Sandeep's post to setup terminal services on the W7 machine. More work, but less than getting OS lic's for each Mac, partitioning, and then having to maintain two OSs on each machine.