My school is just to lazy to upgrade from 7 XD Apparently they had Macs at one point too, which I think would have been better for the school.
Definitely not biased
Terraria Community Forums
Grand Paladin Tyrux
I can not get used to using Mac's, PC forever 
7 will be unsupported pretty soon. (With that, pretty is quite the understatement: could last up until 2020, maybe even further.)