The goal
Improve user-experience on Mac OS X
The situation before
We doesn't have much Mac OS X feedback since mostly users tend to use iTunes or any other media player.
Solution proposed
Look at features we are missing from iTunes (a lot, but mainly iPod support and Podcasts I would say)
Make a native theme to integrate better with the system
Allow user to select Nightingale as default player
When we reach XUL15, look at new features supported for Mac
OS X such as retina
What to do
GitHub issues
#52 Default player on Windows/Mac
#107 Mac native title bar