In response to my post macOS Keybindings In Emacs, Paul R. Jorgensen notes that not every macOS Emacs port has the OS bindings defined. In particular, those ports based on the Mac’s Cocoa interface don’t support them.
Jorgensen has his own post on the matter that goes into a bit more detail. As far as I can tell, unless your using Mitsuharu Yamamoto’s Emacs port for the mac this isn’t a problem but if you’re not using a NextStep based port, you’re probably going to have a problem using macOS keybindings in Emacs.
Not to worry though. If you want those keybindings and your port doesn’t provide them, Jorgensen shows you how to get them. His setup assumes the ⌘ Cmd key is mapped to Super so that, for instance, ⌘ Cmd+s is mapped to Super+s. If you have ⌘ Cmd mapped to something else, it may not work as well. For example, if you map ⌘ Cmd to Meta the way many people do, then ⌘ Cmd+v is going to get you a scroll up rather than a paste.
As I said in my original post, I don’t think that there’s a lot a value in having these bindings added to Emacs—but see hmelman’s comment for an contrary viewpoint—so I wouldn’t bother changing my mappings if you’re a ⌘ Cmd == Meta user. Regardless, as Jorgensen says, “Emacs is a wonderfully flexible tool, is it not?”