Jorge Out!
SMAAIC!
uses a thing called winuae, seems to be a mac version
http://www.zophar.net/macintosh/amiga/macuae.html
I wonder if there's a version on WiiU
wasn't really much of an issue with the wii as they go for about 20 quid anyway.
On the pc one I used a cheap usb bridge and a playstation controller (using the analogue stick) which was fine.