pkg install zsh zsh-completions zsh-antigen zsh-autosuggestions autojump

Start zsh:

zsh

Set the following in you .zshrc:

source /usr/local/share/zsh-antigen/antigen.zsh

# Nice collection:
# https://github.com/unixorn/awesome-zsh-plugins

# Download font from:
# https://github.com/powerline/fonts
# Install on Windows:
# Open Admin PowerShell
# Set-ExecutionPolicy Bypass
# .\install.ps1
# Set-ExecutionPolicy Default
# Maybe use font "Menlo for Powerline", 9pt

# Load the oh-my-zsh's library.
antigen use oh-my-zsh

# Bundles from the default repo (robbyrussell's oh-my-zsh).
antigen bundle git
antigen bundle heroku
antigen bundle pip
antigen bundle lein
antigen bundle command-not-found
antigen bundle autojump
#antigen bundle brew
antigen bundle common-aliases
antigen bundle compleat
antigen bundle git-extras
antigen bundle git-flow
antigen bundle npm
antigen bundle node
#antigen bundle osx
antigen bundle web-search
antigen bundle z
antigen bundle zsh-users/zsh-syntax-highlighting
antigen bundle zsh-users/zsh-history-substring-search ./zsh-history-substring-search.zsh

# NVM bundle
#export NVM_LAZY_LOAD=true
#antigen bundle lukechilds/zsh-nvm
#antigen bundle Sparragus/zsh-auto-nvm-use

# Syntax highlighting bundle.
antigen bundle zsh-users/zsh-syntax-highlighting

# Load the theme.
antigen theme https://github.com/wesbos/Cobalt2-iterm cobalt2
#antigen theme https://github.com/agnoster/agnoster-zsh-theme agnoster

# Tell Antigen that you're done.
antigen apply

# Setup zsh-autosuggestions
source /usr/local/share/zsh-autosuggestions/zsh-autosuggestions.zsh

# Load custom aliases
[[ -s "$HOME/.bash_aliases" ]] && source "$HOME/.bash_aliases"

Switch the shell:

chsh -s /usr/local/bin/zsh