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Full user review
"Cool! Great! Funn!"
I didn't download it from here, but this emulator is great! And just Google some ROMs and you've got it made. I have lots of oldies on my Mac, Super Mario Brothers, Out to Lunch, Breath of Fire, Legend of Zelda.
Nothing is wrong with it, but on a Mac it can be annoying that you have to get used to using keys instead of a controller, so maybe getting one or a joystick would help.