What is “pstree” Package?

Show ps output as a tree
For more details: http://www.thp.uni-duisburg.de/pstree/

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 pstree.

  brew install pstree

Now, use pstree!