There are quite a few Windows apps that I've heard of (never used them, but seen custom x86 carputers running it), and at least 3-4 *excellent* Android apps that I've personally used (each has different strengths and weaknesses, so I install and use 'em all) including some great features such as live data logging and graphing... but sadly, Apple doesn't seem to have as strong of a community for this sort of thing!
I have no idea why that would be, but I know my friend can't find a single iOS app that will connect to this bluetooth OBD2 dongle, and I've never heard of Mac equivalents to some of the PC software. Maybe install bootcamp / parallels and see if you can hack together some of the PC stuff to work?