1. Cài đặt Homebrew 
    /usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
  2. Cài đặt 
    brew install sass/sass/sass
  3. Sử dụng
    4. sass --watch path_to_sass_folder:path_to_destination --style compressed