[Pharo-project] Headless Pharo on Mac OS X?

Hi All, I find that I need headless mode to work on OS X... could anyone suggest where I should start? I'm guessing this will be somewhere in the VM? FYI: headless mostly works in Elliot's latest CogVM, the only problem is that the icon still shows up, but I think this can be fixed with a little work. All the best, Mark