macOS High Sierra 版本10.13 ，brew更

升级到macOS High Sierra 版本10.13 后，使用brew出现报错提示

google了各种解决方案，

1. 变更/usr/local/的属组，无效-系统不允许更改

最终解决方法

1. 卸载homebrew

/usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/uninstall)"

1. 重装homebrew

/usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"

根据提示操作

Error: Could not link:

/usr/local/share/doc/homebrew

Please delete these paths and run `brew update`.