When operating in Auto scanning mode and the button you want is highlighted you press your adaptive switch to select it.
MacOS provides a simple, but powerful access solution that uses one or more switches to control the sequential scanning of an on-screen panel (keyboard). We offer Orby, our colorful button-style switch and two styles of a sip and puff switch. Swifty and Tapio are USB interfaces for connecting adaptive switches to a Mac computer (actually, almost any computer, tablet or phone).
Even though they fit, these adaptive switches do NOT plug into the headphone jack on your device (computer, tablet or phone). Virtually all adaptive switches use a 3.5mm (1/8-inch headphone) audio connector. One must be provided with the adative switch. Mac computers do not have an adaptive switch interface. Follow this link to Apple's web page for more information about macOS built-in Accessibility.
