It turns out to be as simple as: (setq mac-function-modifier 'super) I discovered this after spending an embarrassingly long time failing to figure out how

It turns out to be as simple as: (setq mac-function-modifier 'super) I discovered this after spending an embarrassingly long time failing to figure out how to bind Capslock to Super instead. I thought that would be relatively straightforward given how often people talk about rebinding Capslock, but I couldn't figure out how to do it (from Emacs anyway).