Any solutions? I just updated my mac book (2016) to the most recent update I am allowed (Monterrey 12.7.6) and now my external monitor and bluetooth keyboard and mouse (Logitech dongle) do not work (using the same Apple brand HDMI/usb-c power/USB adapter as before). I've tried restarting, sleep mode, unplugging/plugging, etc. Is the only option to downgrade os? If so, pretty disappointing and will definitely reconsider a 3rd mac book in the future unfortunately.