What is “pngcheck” Package?

Print info and check PNG, JNG, and MNG files
For more details: http://www.libpng.org/pub/png/apps/pngcheck.html

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 pngcheck.

  brew install pngcheck

Now, use pngcheck!