Yay for getting a mac. I do not have one. You know Trish B. from Lipstick and Crayons. She has one, and loves her. She might be able to answer some questions for you :) I know how hard it can be to be without a computer, big sigh! 
Have a wonderful time at your retreat. You so deserve to get away, and you will come home refreshed to be the superstar that you are!