Ernie Smith wrote a profile of the Mac font called LastResort. It only appears when the OS can’t find an appropriate character of the system font.
But LastResort is a more interesting font than it seems. It’s essentially the typography form of hieroglyphics, showing unusual characters intended for people building fonts to have some sort of error system that helps them figure out what might be missing from their typeface.
A great write up of a font I had never heard of before.
Check It Out: ‘LastResort’, the Story Behind the Mac’s Mysterious Font