fontspec and/or xdvipdfmx can't find certain fonts [duplicate]

This morning, I updated my MacTeX installation to the 2015 install. Unfortunately, something is now having some trouble with the font (Century/Century Schoolbook) that I use most [edit: everything worked fine before]. I'm a relative amateur with TeX and couldn't fix the issue with a couple hours of Googling, so here I am. Help!

The issue appears to be that fontspec and/or xdvipdfmx (whatever that is) are having trouble finding certain fonts on the computer. So some fonts work, others just don't. My investigations suggest that the fonts that are having trouble appear to be ones that came with MS Word—all of the offenders so far were originally located in /Library/Fonts/Windows. I moved them to the main folder but that didn't help, so I don't know what it is that's making these specific fonts invisible or uncooperative.

I've seen two similar errors. First, e.g., with the Century font. This code:

\documentclass[12pt]{article}

\usepackage{fontspec}
\setromanfont{Century}

\begin{document}
This is a test.
\end{document}


Produces this error and refuses to compile/typeset:

xdvipdfmx:fatal: Cannot proceed without the font: /Library/Fonts/Century


But with other fonts, e.g. Colonna, I get something slightly different. This code:

\documentclass[12pt]{article}

\usepackage{fontspec}
\setromanfont{Colonna}

\begin{document}
This is a test.
\end{document}


Produces this error and refuses to compile/typeset:

/Test.tex:5: fontspec error: "font-not-found"

!

! The font "Colonna" cannot be found.


marked as duplicate by Alan Munn, Jesse, Werner, Svend Tveskæg, Romain PicotDec 27 '15 at 8:42

• Welcome to TeX.SX! Both examples show Colonna -- I think the first one should be Century? – user31729 Sep 11 '15 at 19:56
• Can you compile those examples with LuaLaTeX? I know you want to use XeLaTeX - I'm not proposing a solution, it is just useful to know whether the problem is specific to XeTeX or not. – cfr Sep 11 '15 at 23:29
• Did these fonts work before you switched to TL 2015? Have you used TeX Live Utility or tlmgr to update the new installation? – cfr Sep 11 '15 at 23:34
• Thanks for the thoughts! Replies. (1) Oops! Fixed it, thanks. (2) Umm ... I've never used LuaLaTeX before and I'm not sure how to go about it, but that makes good sense as a suggestion. I'll try to find time to look into that and post what I find. (3) Yep, everything was fine before, and I have updated with the TeXLive Utility. – Joe M. Sep 12 '15 at 20:26
• @cfr — Alright, I swapped TeXShop over to LuaLaTeX. (I just changed it in the pull-down menu top left. If there's something more I need to do to make LuaLaTeX work I missed that.) It's still not working, but interestingly enough Century now throws the fontspec "font-not-found" error instead of the "xdvipdfmx:fatal" error. So maybe the problem is specific to fontspec? – Joe M. Sep 12 '15 at 20:33

I had the same issue, drove me mad. I generate documents that used the Century Gothic font. I upgrade my mac to El Capitan, and then reinstalled the newest TeX stuff. Since then, I could not get it to work.
Eventually I found out the fonts in my /Library/Fonts folder were 0 bytes, some kind of mac-thingy called "suitcase fonts". I removed my century gothic font, and installed a .ttf version from a windows box into the computer font store (/Library/Fonts again). Then everything worked like a charm!