Use the Mac in a moving car without feeling sick

Working on a laptop in a moving train or car makes a lot of people queasy. Your eyes report that the screen is perfectly still while your inner ear reports being thrown around a bend, and it is that disagreement, not the reading, that turns your stomach.

Open System Settings → Accessibility → Motion and turn on Vehicle Motion Cues. Animated dots appear around the edges of the screen and move with the vehicle — sliding as it accelerates, leaning as it corners — so what you see finally agrees with what you feel. The Mac works out the movement by itself, and the rest of the screen is untouched: you carry on with whatever you were doing.

It works best sitting facing forwards, and Apple is explicit that it is not for whoever is driving.

You need a laptop for this — there is nothing to detect on a desktop Mac — and it is missing on the MacBook Neo, the M1 MacBook Air, the 13-inch M1 MacBook Pro and anything older.