If I export a PDF from Mathematica, then open it with Illustrator, the fonts glyphs will *sometimes* appear as boxes.

Why does this happen? Is there a workaround?

I experimented with several fonts in `Graphics[{Text[Style["text", FontFamily -> "Arial"]]}]`. Helvetica, Times, Helvetica Neue, Zapfino, Futura all appeared as boxes. Calibri, Arial, Georgia, Baskerville, Times New Roman all appeared correctly.

I have already seen this question: http://mathematica.stackexchange.com/questions/6923/edit-a-mathematica-plot-in-illustrator-missing-font-problem. I have copied the Mathematica fonts to to `~/Library/Application Support/Adobe/Fonts` and since then glyphs appear fine in Illustrator *if I don't specify a custom font at all*. The difference between this question and that one is that now I am asking about the situation when custom (non-default) fonts are used.

The fonts which don't work are all already accessible to Illustrator, but I tried to copy them to the `Adobe/Fonts` folder anyway. It didn't make a difference. I am on OS X 10.10.4, using Mathematica 10.1 and 10.2.

[![enter image description here][1]][1]


 [1]: https://i.sstatic.net/ZIXjR.png