When you mean American Typewriter, Futura, Optima etc. you're wrong
because they are saved in .dfont format which can't be used from LuaTeX
but you can create normal ttf fonts with the program fondu.
Thanks Wolfgang, yes, I meant that.
Well, I looked at the info and "kind" was "True Type". Didn't know that the type can be packed in a dfont format.
I can see from "location" that most of system fonts are dfont, other are ttf.
But sometimes there's no indication, e.g. Library/Fonts/Bradley Hand ITC TT-Bold.
How can I understand the format
Thanks
Best
-a-