I think Macs should get more respect. Of course, the only way they would is if:
They had more A-list games
They had a two-button mouse (seriously, ONE button?)
But anyhoo, I have heard of a SMB3 ROM level editor for Mac OSX. I don't remember what it's called, but it had some pretty powerful features. But even if I did remember what it was called, I'm not entirely sure I can talk about it.