Are there any emulators that are allowed that I can use on mac?

Well, the ONLY allowed Emulator is Gambatte Speedrun r649. Just click this link to download: https://github.com/Dabomstew/gambatte-speedrun/releases You also need a GBC BIOS image. Here's the link for that: http://docs.libretro.com/library/gambatte/ Please let me know how this works out for you. It took me a while to find a website that still had the GBC Bios Image up. Thanks.

Also, it does work on MacOSX