Mac OS X current unstable?

[Dardón Aguilera, Javier Arturo]

Frist I'd like to thank you for this great software, I haven´t used it yet, but 
I already had troubles triying to make fine looking music sheet in Sibelius, 
(and I hate the mouse secuences). The music I've download from your site (and 
from the Mutopia project) it really looks like the old & beautiful hand-maded 
scores. It really comes out the difference. Yesterday and today I was reading 
all your site and you really convinced me. Now I'm anxious to start making 
music with LilyPond and even contribute to Mutopia Project. But I have only one 
question, why al the Mac OSX versions says currente unstable? What does it 
means?, and Why only the Mac Version?; can I run it without problems.

Best Regards, and Congratulations on your really great job. 

Javier Dardón