macOS 安裝 wget

適用於macOS Sierra

Apple Store下載安裝Xcode
安裝Homebrew包管理，類似於Ubuntu下的apt-get: 終端下輸入 ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
終端下輸入：brew install wget

安裝完畢！ 

==> Pouring wget-1.18.sierra.bottle.tar.gz

$ wget

wget: missing URL

Usage: wget [OPTION]... [URL]...

Try `wget --help' for more options.