Mac的套件管理工具 Homebrew

# install brew
ruby -e "$(curl -fsSL https://raw.github.com/gist/323731)"

# install packages (e.g. install wget)
# all packages are installed at /usr/local/Cellar folder
brew install wget

# update, search, list all installed packages
brew update
brew search ${KEY_WORD}
brew list

Reference: Homebrew