你需要通过brew install macvim 的wim 才能显示

因为坐着网页写了：This plugin is used for displaying thin vertical lines at each indentation level for code indented with spaces. For code indented with tabs I think there is no need to support it, because you can use :set list lcs=tab:\|\ (here is a space).

大意就是使用tab缩进的不支持。以下是我在找到的解决方法，复制进自己的_vinrc文件：

"设置tab缩进为4个空格
set ts=4
set expandtab
set autoindent
set list
set lcs=tab:\|\-

我也遇到这个问题了，求解答