What is “vttest” Package?

Test compatibility of VT100-compatible terminals
For more details: http://invisible-island.net/vttest/

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 vttest.

  brew install vttest

Now, use vttest!