Zsh

The Z shell (Zsh) is a Unix shell that can be used as an interactive login shell and as a command interpreter for shell scripting. Zsh is an extended Bourne shell with a large number of improvements.

Installation

brew install zsh zsh-completions

To use the brew zsh as your default shell, run:

sudo dscl . -create /Users/$USER UserShell /usr/local/bin/zsh

$ $SHELL --version
zsh 5.3 (x86_64-apple-darwin17.0)