zsh にとても興奮していましたが、大きな問題が発生しました。
のオートコンプリートがhg update機能しません。次のようにzsh_completion ファイルに（最新のmercurialソースから）ファイルを含め.zshrcました（ホームディレクトリに移動した後）：
fpath=("$HOME/.zsh_completion" $fpath)
autoload -Uz compinit
compinit
しかし、うまくいかないようです。入力hg up def<tab>しても完了しません。
私も試しrm -f ~/.zcompdump; compinitてみましたが、同様に役に立ちませんでした。と を使用zsh 5.1.1 (x86_64-apple-darwin15.0.0)してoh-my-zshいます。
私の実際.zshrc：
# Path to your oh-my-zsh installation.
export ZSH=/Users/kayne/.oh-my-zsh
# Set name of the theme to load.
# Look in ~/.oh-my-zsh/themes/
# Optionally, if you set this to "random", it'll load a random theme each
# time that oh-my-zsh is loaded.
ZSH_THEME="robbyrussell"
#ZSH_THEME="agnoster"
# Uncomment the following line to use case-sensitive completion.
# CASE_SENSITIVE="true"
# Uncomment the following line to use hyphen-insensitive completion. Case
# sensitive completion must be off. _ and - will be interchangeable.
# HYPHEN_INSENSITIVE="true"
# Uncomment the following line to disable bi-weekly auto-update checks.
# DISABLE_AUTO_UPDATE="true"
# Uncomment the following line to change how often to auto-update (in days).
# export UPDATE_ZSH_DAYS=13
# Uncomment the following line to disable colors in ls.
# DISABLE_LS_COLORS="true"
# Uncomment the following line to disable auto-setting terminal title.
# DISABLE_AUTO_TITLE="true"
# Uncomment the following line to enable command auto-correction.
ENABLE_CORRECTION="true"
# Uncomment the following line to display red dots whilst waiting for completion.
# COMPLETION_WAITING_DOTS="true"
# Uncomment the following line if you want to disable marking untracked files
# under VCS as dirty. This makes repository status check for large repositories
# much, much faster.
# DISABLE_UNTRACKED_FILES_DIRTY="true"
# Uncomment the following line if you want to change the command execution time
# stamp shown in the history command output.
# The optional three formats: "mm/dd/yyyy"|"dd.mm.yyyy"|"yyyy-mm-dd"
# HIST_STAMPS="mm/dd/yyyy"
# Would you like to use another custom folder than $ZSH/custom?
# ZSH_CUSTOM=/path/to/new-custom-folder
# Which plugins would you like to load? (plugins can be found in ~/.oh-my-zsh/plugins/*)
# Custom plugins may be added to ~/.oh-my-zsh/custom/plugins/
# Example format: plugins=(rails git textmate ruby lighthouse)
# Add wisely, as too many plugins slow down shell startup.
plugins=(colored-man colorize ruby rails brew osx mercurial zsh-syntax-highlighting)
# User configuration
export PATH="$PATH:/Users/kayne/.rvm/gems/ruby-2.2.1/bin:/Users/kayne/.rvm/gems/ruby-2.2.1@global/bin:/Users/kayne/.rvm/rubies/ruby-2.2.1/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/opt/X11/bin:/Users/kayne/.rvm/bin"
# export MANPATH="/usr/local/man:$MANPATH"
# PostgreSQL App
export PATH="/Applications/Postgres93.app/Contents/MacOS/bin:$PATH"
# This loads NVM
[ -s $HOME/.nvm/nvm.sh ] && . $HOME/.nvm/nvm.sh
fpath=("$HOME/.zsh_completion" $fpath)
autoload -Uz compinit
compinit
source $ZSH/oh-my-zsh.sh
# everything below is commented out