GoKawiilApple's MacBook heat guidance: why shade matters more than temperature alone
Apple advises keeping Mac laptops in ambient temperatures between 50 and 95 degrees Fahrenheit, warning explicitly against leaving them in parked cars. That ambient limit refers to surrounding air, not the surface temperature a MacBook can reach when sitting in direct sunlight, which Apple doesn't separately quantify. Prolonged exposure above 95 degrees can permanently shrink battery capacity, with charging in such heat causing further damage.