What is “optipng” Package?

PNG file optimizer
For more details: https://optipng.sourceforge.io/

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 optipng.

  brew install optipng

Now, use optipng!