I know your question about the burns is already answered by others but its important to consider that the generally accepted optimal temp for extracting the flavour from coffee beans is approx. 90-95°C, and hotter gives the coffee a more ‘burnt’ or less favourable flavour, so your coffee shouldnt be that hot. Further to this if you drink your coffee with milk, the milk is frothed at about 65°C which would bring the overall temp down a little more.
This is all in an ideal world where Maccas actually gives a fuck if their coffee is ‘good’