How to map mac command key in vim?

Question

I want to map my NERDTREE toggle to Cmd + space but I don\'t know what character represents Mac\'s command key in .vimrc. I searched and found that we can use \

Answer 1

With IdeaVim you can use: <M-*>

Answer 2

It is true that <D- maps to command key. You can see it by :help <D-.

However, this will not work in your vim+terminal. It only works in MacVim. See here

The best shot for your intention is to map the combination as hex code, sending to terminal.

Still I will not recommend doing this. command is too important for mac os environment. For example, anyone uses an input method can't map it to command+space.\

Please consider using the usual method here: <leader>.

Answer 3

iTerm2 can do this - here I mapped command enter to :wq