Mostly Emacs versions under macOS does not have compiled with DBus. Or still don't work even compiled with DBus even macOS installed dbus with homebrew. I'm under this situation and problem. Spend lot of time have not solution to solve this problem. So I give up on Emacs DBus support under macOS to make "notifications.el" work.

I added patch on org-notify.el to make it invoke AppleScript command to display notifications. Hope it help some macOS users.