I'm going to be tasked to write all my new stuff and migrate all the .net apps to ObjectARX to get ready for the Mac Version!
Let us know how it goes. Hopefully, you don't end up spending a ton of time converting a bunch of .NET apps to ObjectARX, and then spend the time and effort to test them on both PC and Mac, only to have hardly anyone use Mac Autocad.
Some people seem to be excited by the Mac version, but for the majority of users, the basics haven't changed. Namely, PC's are significantly cheaper than Mac's for the same performance, and that's a key factor in corporate buying decisions, especially when purchasing a lot of machines.