What does 'font name' in the fontspec package refer to on a Mac

Question

On a Mac using XeLaTeX and the fontspec package, what is meant by font name?

The Font Book application lists several possibilities:

• PostScript name
• Full name
• Family

I.e. which name should I type into the \setmainfont [⟨font features⟩] {⟨font name⟩} command?

For example, for the font named as Times (top unexpanded item) in Font Book, the following values exist:

 PostScript name: Times-Roman
 Full name:       Times Roman
 Family:          Times

Answer 1

XeTeX checks Full name first if no match and the name has a hyphen, it checks it as Family-Style, if no match checks PostScript name and finally if non of this matches, it will check Family name.

In most cases, you want to use Family name, so that XeTeX takes care of loading various font styles automatically (bold, italic etc.) unless you want only a specific style, then Full or PostScript names would be recommended (e.g. with \newfontface).

Answer 2

Both the Postscript Name and the Full Name should work with XeLaTeX.

Answer 3

with lualatex I use:

\documentclass{article}
\usepackage{unicode-math}
\setmainfont
  [UprightFont = * Roman,
      BoldFont = * Bold,
    ItalicFont = * Italic,
BoldItalicFont = * Bold Italic,
]{Times}
\setmathfont{XITS Math}
\begin{document}

Text $x+y=\sqrt{z}$ \textbf{Text} \textsc{Text}

\end{document}

If you do not have the XITS math then use another math font, like Asana Math