How to Megasquirt your 3G Hemi
As a side note, one of the benefits of the tuning software for Megasquirt is that it is Mac OS compatible. Or more specifically they have a Mac version. FAST, AEM et. al. don't have Mac versions, of course you can run Windows natively on a mac, but why buy a license for windows if you don't have to? You do however need to download a USB driver.
This page at DIYAutotune.com may help you find the drivers and tuning software.
http://www.diyautotune.com/softwarelinks.htm
Best of Luck,
Thanks again Uhcoog1
Regards,
Joe Dokes