a handful of people have tried to create a Mac version of sim-on-a-stick but have run into various impasses. i even tried, which is laughable because i might have a total of 20 minutes Mac experience, and came across an issue when trying to get MAMP running
MAMP is Mac, Apache, MySQL, and PHP and is equivalent to WAMP (Windows, Apache, MySQL, and PHP done via MoWeS for SoaS). MAMP and WAMP basically turn a USB stick into a server (not the same as a live USB which contains an entire operating system)
past attempts have gotten close but never quite made it – that may change now with Kat Prawl!
she’s quite talented and very persistent which makes for an awesome combo!
there’s a wiki page up that might serve as a great collaborative place for Mac experts to put all their apples in one basket (sorry, couldn’t resist)
good luck, there are many out there, especially teachers that would love it and thus benefit a whole bunch of kids! =)