I was wondering if anyone could tell me which tab up here on UG would be the best for learning the song Come Clarity?

My main problem is that I'm not sure at all which tab follows the right tuning, or is the most accurate. I'd preferably like to avoid one that's Guitar Pro/Powertab seeing as I don't have either program. Of course, if someone can let me know of a way to get Guitar Pro (for Mac) for free, that works great too.

Much thanks in advance
I have guitar pro for mac, I got it off Limewire, but it sucks, no rse and it freezes at random times.