On Fri, Dec 22, 2017 at 09:26:18AM +0200, Eli Zaretskii wrote:
> > From: Paul Rankin <hello@paulwrankin.com>
> > Date: Fri, 22 Dec 2017 15:16:32 +1000
> > 
> > I’ve now tested this with Emacs versions 24.4, 25.4, 26.0.90 and HEAD
> > with the same results; this hasn’t happened for me with 24.x in the
> > past, so it appears that something has changed with macOS High Sierra
> > that screws up the display of shortcut keys in the menus.
> 
> You are probably right.

It seems that older macOS versions ignored keyboard shortcuts they
didn’t understand, but High Sierra appears to use a ‘best effort’
attempt which results in it just printing out the first character
(capital C for ctrl, so shift‐C).

I’ve attached a patch that I hope fixes it.

-- 
Alan Third