FOSS gamedev and creative worlds

I just need to know the folder location on Mac OS X. I enabled hidden files and searched all over the computer but I could not find the sub game folder.

/home/username/.minetest/games/

Right there. Pretty sure that's how OS X works.

The main directory for your Minetest content is ~/Library/Application Support/minetest/

~ is the same as /Users/<your username>

Inside that directory, you'll find the typical games, mods, and other directories. You'll put subgames into the games directory.