The font entries listed between begin_fonts and end_fonts
in a configuration file are not restricted to PostScript fonts.
The entries are really for any non-PK font, and that could be an outline font
in TrueType format, or even some sort of bitmap font in non-PK format.
The critical requirement is that a matching TFM file exists so that
TEX can typeset characters from that font.
When previewing a DVI file containing a non-PK font
(or when printing such a file on a non-PostScript printer),
draws characters using the corresponding Macintosh screen font
given in the config file. If the requested screen font can't be found then
will warn you and use the system font instead.
If you want to use PostScript fonts with then for best results
you should install the TrueType or ATM versions of the screen fonts listed
in the Default config file.