What is “nestopia-ue” Package?

Nestopia UE (Undead Edition): NES emulator
For more details: http://0ldsk00l.ca/nestopia/

Installation

• Open Terminal by pressing command+space then type terminal and hit Enter key.
• Install homebrew first.

  ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)" < /dev/null 2> /dev/null

• Install nestopia-ue.

  brew install nestopia-ue

Now, use nestopia-ue!