You would have to find a version of Odin that would work on a mac or get a Windows emulator so that you could run it on mac. I do not have a mac, so I can't give you any specifics. But if you create a thread (or allow me to move this one) in Computers & IT - Android Forums asking for advice on a free windows emulator for mac to run Odin on, I'm sure they could get you set up with one.

 

Did you find a good Mac root?

Has anyone tried this:
How to Root Galaxy S3 on Mac OSX! U.S./Canadian ~ Android Rootz | Source for Android Rooting, ROMS, Tricks and more!

 

It doesnt really exist as odin (the tool you use to root) isnt compatible. As jero said, youd need a windows emulator that supports usb contollers in order to do so. Just find a friend thstll let you install odin amd the other files you need you can keep I n a flash drive if that person is paranoid about you installing crap on their computer

 

Am interested if anyone tried the link in d0g's post
I would love to root on my mac, as many others, but do not want to be a test dummy
on my old evo, root on a mac was 1 click and done... soooooo easy...