Runs native on a Mac?

Closed, because of duplication:

I saw that the udk runs on mac too - fantastic - but only from 10.9.2 up?
why is this so - can i try to run it on mac with mountain lion 10.8.5 ?
my system runs so smooth and all is working perfect so i don’t want to change to another system.

i have a mac pro 12 core and external 4 x GTX titan 6GB and on sytem a GTX 680 4 GB
that normaly be enough power - or?

best regards