Building programs for Macs?

I've had MMF2 for several years, but it's been a while since I've used it and I've forgotten several things. I've only ever used it to create games for myself and friends, all of whom had PCs. One of these friends has a Mac now and wants another game, but the last ones I've made won't work on her new computer. What would be necessary for me, who has a PC, to make a game that would run for her, who has a Mac? Would I have to buy the iOS export module, or is there a way to do that without it?

Maybe you could use Wine Bottler and wrap your MMF2 exe so it runs on a MAC.