Env: vim+zsh+iTerm2 on Mac OSX 10.9.2. (Same problems in macvim on Mac OSX 10.9.2)

2. Mapping Problem

In mac, mappings for <A-char> won't directly work in mac.

:inoremap <A-u> type some string A-u
:inoremap <A-p> type some string A-p
i  õ           * type some string A-u
i  ð           * type some string A-p

As far as I know about <A-char> in mac, hit <A-u> will print nothing but with a sound alert. hit <A-p> will print π. I found that map for π works well.

:inoremap π type some string A-p

Is it possible to map <A-u> in vim? Yes! Let me go into this problem deeply:

:map <A-S-p> not work
:map ∏ works well(A-S-p will print `∏`)

:map <C-A-p> not work
:map <C-π> still not work

:map <C-S-p> do work
:map <C-1> not work

So , is it possible to map Ctrl-Alt-char and Ctrl+Number?

Of course, you can use fastcodes in vimfastcodes in vim. Refer to https://stackoverflow.com/questions/23606892/vim-keyboard-mapping-problems-in-mac/23608928#23608928

1 Answer 1


If you use MacVim, the easiest way is:

set macmeta

So that MacVim will treat alt/option as Meta key, you can then bind:

nmap <C-M-S> :call foo_func()

The keys pressed for above is: Ctrl+alt+s.

Hope this helps and solves your issue, happy Vimming!

  • It only works in macvim.app, not work in macvim's terminal vertion.
    – ahuigo
    Jan 24, 2015 at 7:25
  • You can override sys default vim with: brew install macvim --override-system-vim
    – Wayne Ye
    Jan 27, 2015 at 4:12

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