Hey, did you maybe take "demonheart" out of the folder it was packed with? It seems like it can't find all the game files. Other than that, I don't know what could cause the error. I've uploaded an older version of the game too, just in case.
I'm sorry it didn't work for you. I will issue a refund.
I would like to hear from other Mac users, is this issue affecting everyone? Maybe it's related to some system update, there have been a few reports about this recently.
