I could be wrong, but I don’t think these are emacs keybindings: although, the Cocoa text input system definitely is heavily influenced by emacs, both in design

I could be wrong, but I don’t think these are emacs keybindings: although, the Cocoa text input system definitely is heavily influenced by emacs, both in design and in this sort of detail. The emacs-derived keybindings use Control on macOS, the Mac ones use Command