What is “pngquant” Package?

PNG image optimizing utility
For more details: https://pngquant.org/

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 pngquant.

  brew install pngquant

Now, use pngquant!