I'm not a Mac person, but if you can run Windows on your Mac, you can install EQ. Prices vary, including the cost of buying Windows.
Well, it a lot easier if your Mac has an Intel processor.
http://store.apple.com/us/browse/guide/windows
And there is plenty of other software that allows a cheaper way for you to run Windows only applications on a Mac.
As an example (you'll have to do your own research):
http://www.parallels.com/landingpage...FSVa7AodPV1K_g