Installation Steps:

  1. Open Terminal using Spotlight search by pressing <command+space>. Type terminal and hit Enter key.
  2. Now, run
    ruby -e “$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)” < /dev/null 2> /dev/null
  3. Install abyss using brew
    brew install abyss

abyss is ready to use now!