I had several requests from Mac users that if there is a plan to support OSX.
Unfortunately, I haven't been able to do try it yet.
Due to the restriction the library I'm currently using, virtually I need to create a program from zero.
The core library is written in C++, and some can be migrated for OSX.
UI library is totally Win32 dependent, so I need to start using OSX library, although this should be much simpler than windows.
I was thinking to use cross platform library, such as WxWidgets. (
http://www.wxwidgets.org/)
Another issue is that I still need to raise fund/resource to build an environment for the development on OSX.
(Buying Mac, finding time etc) This is actually a big challenge to me in reality - so I'm not sure when I can do this.
(Forming LLC and releasing Pro version is the part of the plan.)
However, an alternative I'm thinking right now is a Web version (then, OS doesn't matter, right? ;-)
I'm actually a web developer too and this route might be easier and realistic, I think.
(The rendering engine might be on server side to make it even simpler at first.)
Using Silverlight might be an another option. (This case, it won't work with iPad)
Anyway, I've been trying to figure out what the best way to accomplish this, so please wait for a while.