Crafty Rube Goldberg-ing for social good (making tech more accessible):
Control your Mac using head movements. Rotate your head to move the cursor and make facial expressions to click, drag, and scroll. Powered by your iPhone’s TrueDepth camera.
[YouTube]
Your title says “Control a Mac via head momements”
I *meant* to say that! Only an elect few (the *real* heads) know what I meant. Covfefe!