This is very exiting news.
I am probably one of a small number of users who has never used the Windows version. I bought my first 3D modeling software (trueSpace) in 1997 shortly after Rhino Version 1 was released, and had been using it ever since.
When I switched from Windows to Mac in 2007, because I no longer wanted to suffer the daily indignities Windows was throwing at me, I did not want to get the Windows Rhino version. Then trueSpace was bought by Microsoft, and they killed it.
I then heard about the ongoing development of Rhino Mac, and started to work with it in 2012. Many things were not working yet, and I was continuously frustrated using it. I kept coming back to it, and now I can do almost anything I need to do with it. (It would be nice to have 360 degree animation).
I was even able to contribute to the development a little bit by finding a few bugs, which makes me feel I am part of this great community of developers, designers, resellers, etc.
I am looking forward to using RC 1 and later the full release.
I can only begin to imagine how exited the developers must be right now.