To add support for Mac you just need to enable the platform support and then either the Mac OS X App bundle or Launcher Distribution. I did run into some issue with the JRE that ships with 10.1 but the update from Apple fixed them. You will also have to launch the installer from a console window with root privileges if you plan to install to system level locations (i.e. System folder) and there is no way to invoke the authentication services. I had to write a piece of code that makes the API call to Mac OS to invoke the authentication service then launch the installer with these privileges, of course I also had to build an uninstall helper to do the same.
