What is “tcsh” Package?

Enhanced, fully compatible version of the Berkeley C shell
For more details: http://www.tcsh.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 tcsh.

  brew install tcsh

Now, use tcsh!