I just wanted to write up what a great job you are doing, that your effort is most certainly appreciated, and I'm glad you haven't left us old school gamers at the mercy of bootcamp/Windows
You never were at that mercy. SDLMAME runs terrific on OS X (it's a few ticks faster than MAME OS X due to the lighter-weight video path) and combined with MAMEPGUI has an arguably easier-to-use interface.
