Hey just wanted to follow up. Sadly, I don't think we will be able to make a 64bit mac version anytime in the near future. We tried, but will need to puchase a mac computer in order to do that, and unfortunately thats out of the budget for a small indie studio like ours. Hopefully there will be an easier way to do it in a future update of Unity, and when there is, we will be sure to support Mac 64bit!
Thanks for being interested in Faulty Apprentice and apoligies for being the bearer of bad news. -din