Last login: Mon May 28 13:35:31 on ttys001

You have mail. [oh-my-zsh] Insecure completion-dependent directories
 detected: drwxrwxrwx 7 hans admin 238 2 9 10:13 /usr/local/share/zsh
 drwxrwxrwx 6 hans admin 204 10 1 2017
 /usr/local/share/zsh/site-functions
 
 [oh-my-zsh] For safety, we will not load completions from these
 directories until [oh-my-zsh] you fix their permissions and ownership
 and restart zsh. [oh-my-zsh] See the above list for directories with
 group or other writability.
 
 [oh-my-zsh] To fix your permissions you can do so by disabling
 [oh-my-zsh] the write permission of "group" and "others" and making
 sure that the [oh-my-zsh] owner of these directories is either root or
 your current user. [oh-my-zsh] The following command may help:
 [oh-my-zsh] compaudit | xargs chmod g-w,o-w
 
 [oh-my-zsh] If the above didn't help or you want to skip the
 verification of [oh-my-zsh] insecure directories you can set the
 variable ZSH_DISABLE_COMPFIX to [oh-my-zsh] "true" before oh-my-zsh is sourced in your zshrc file.

解决办法

终端输入

chmod 755 /usr/local/share/zsh
chmod 755 /usr/local/share/zsh/site-functions

https://www.jianshu.com/p/03bcc3e2930e