
In 2015, test files were created which typeset short samples of every
available font in the latest operating system, Yosemite.

Jiang Jiang then patched xdvipdfmx to process every one of these fonts except two bitmapped fonts, GB18030 Bitmap and Apple Color Emoji.

As testing ended, these test files were also sent to the LuaTeX people,
because LuaTeX had trouble wit over 55 of the 214 fonts. It is not
known if they will have time to fix their software.