1.安装homebrew
ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
2.安装wget
brew install wget
3.安装zsh
wget https://github.com/robbyrussell/oh-my-zsh/raw/master/tools/install.sh -O - | sh
4.修改主题
vim ～/.zshrc
改成ZSH_THEME="avit"
5.重启终端
原文：http://www.cnblogs.com/huangshiyu13/p/6930068.html