What is a Makey Makey? How does it work? What kind of things can you do with it?
Here is a video that explains how it works:
Ways of using the MakeyMakey
If your mac says maxeymaxey is damaged, check this: http://www.tech-recipes.com/rx/45404/mac-downloaded-app-is-damaged-and-cant-be-opened-error-solved/
There is also a processing code template on the Hardware Hacking page.