Questions: Wordpress updates, Mac OSX

Hello! I am a very happy Atahualpa user, and am excited about the possibilities of Themeframe. My plan is to use TF for my clients - to offer them their own custom theme with each website design. However, I have a few specific questions.

1. How are Wordpress updates handled? For example, when Wordpress goes to 3.x, how is Themeframe updated? More importantly, how are TF updates handled by the end user? Do I - as the developer - have to updated the theme and then notify my clients, or will there be some sort of automatic update that clients can do themselves?

2. What is the current status of TF on Mac OSX? That's what I'm using, and if TF can't be run on a Mac right now, then I don't want to purchase it until it does. But I also want to get in on the $80 beta pricing. I looked at this thread, but the link in the thread to the explanation is to the private TF forum.

Thanks in advance!