I don't know too much about Mac computers, but the Wineskin error leads me to think that it's not as much of a game issue, as it is your Wineskin program. Wineskin was often used to help Windows games run on Mac computers, so something could have gone wrong there. (Maybe try disabling Wineskin when you open Feral-heart?) When you installed the game, did you download the Mac or the Windows version?