MIKE I'M NOT HELPING YOU WITH YOUR PHONE UNTIL YOU READ THIS THREAD IN ITS ENTIRETY. If you have questions after reading I will walk you through it. And before you start complaining the steps in this post will not take longer than 10 mins and I"m serious. It's not hard if you put in the time and have patience.
That being said here you go...
http://forum.xda-developers.com/show....php?t=1974114
AND THIS IS HOW YOU ROOT WITH A MAC
http://galaxys3root.com/galaxy-s3-ro...s3-on-mac-osx/