Good news, Guilty Gear X2 Reloaded is released for the Mac now on GOG.com, Click on the link mentioned here or use the blue “Buy the mac game here” button, and create an account using the signup in the top bar on the GOG.com website and buy the game. You automatically get when creating an account 10 free GOG games added to your account (most of them also native for Mac so no port required) so you have nothing to loose, only to receive.
You can also use a controller for the game. Tested here with a cheap ps3 controller imitation:Wired USB 2.0 Control Pad for PC (Black) (+ free shipping) which works fine with the game.
It is 22nd century. Mankind discovers an unlimited source of energy and named it Magic. Despite this solution to the world’s energy crisis wars never ceased and Magic was used to create new weapons of great power, called Gears. Eventually these creations turned against their creators and started a century-long war known as the Crusades. Justice, the leader of the Gears was finally defeated and locked in a dimensional prison. Soon after that, the remaining Gears were deactivated, but some of them survived…