oh-my-zsh installation http://ohmyz.sh/

oh-my-zsh-install.md

Installation:

sh -c "$(curl -fsSL https://raw.github.com/robbyrussell/oh-my-zsh/master/tools/install.sh)"

Once installed, to toggle betwen zsh and bash (default shell in OSX) without uninstalling oh-my-zsh (uninstall_oh_my_zsh), just run the appropriate:

chsh -s /bin/zsh
chsh -s /bin/bash

# check the default shell
echo $SHELL

See:

• https://github.com/robbyrussell/oh-my-zsh/wiki
• https://github.com/robbyrussell/oh-my-zsh/wiki/Installing-ZSH