Query macOS for available system fonts.

[anntzer]

... instead of only relying on a fixed list of directories to check. Note that both previously and with this PR, we continue also querying fontconfig.

See #10932. This should close the original issue (#10201); for #10932 I would suggest further dropping out the extra hard-coded directories (X11FontDirectories, OSXFontDirectories) that are searched.

PR summary

PR checklist

• "closes #0000" is in the body of the PR description to link the related issue
• new and changed code is tested
• Plotting related features are demonstrated in an example
• New Features and API Changes are noted with a directive and release note
• Documentation complies with general and docstring guidelines

[ksunden]

I did not realize that plistlib was in the std library...

[QuLogic]

Is this output portable across different system languages?

[anntzer]

From a quick check, the answer appears to be yes.

[greglucas]

I'll note that system_profiler -xml SPFontsDataType is quite a bit slower than fc-list for me. This does work as expected and is only adding extra time to the initial cache build.

[dstansby]

LGTM; doesn't take that long to build the font cache on this PR for me (~seconds on an M2 MacBook Air), and more fonts are found (374 before, 497 after)

[denis-bz]

@anntzer, on my macos 10.15.7 Catalina

system_profiler -xml SPFontsDataType  2>&1    # <- def _get_macos_fonts() in mpl 3.9.0

💥

2024-05-17 11:56:24.964 system_profiler[1061:15889] CoreText note: Client requested name ".AlBayanPUA", it will get Times-Roman rather than the intended font. All system UI font access should be through proper APIs such as CTFontCreateUIFontForLanguage() or +[NSFont systemFontOfSize:].
2024-05-17 11:56:24.964 system_profiler[1061:15889] CoreText note: Set a breakpoint on CTFontLogSystemFontNameRequest to debug.
2024-05-17 11:56:24.968 system_profiler[1061:15889] CoreText note: Client requested name ".AlBayanPUA-Bold", it will get Times-Roman rather than the intended font. All system UI font access should be through proper APIs such as CTFontCreateUIFontForLanguage() or +[NSFont systemFontOfSize:].
2024-05-17 11:56:24.972 system_profiler[1061:15889] CoreText note: Client requested name ".AlNilePUA", it will get Times-Roman rather than the intended font. All system UI font access should be through proper APIs such as CTFontCreateUIFontForLanguage() or +[NSFont systemFontOfSize:].
2024-05-17 11:56:24.975 system_profiler[1061:15889] CoreText note: Client requested name ".AlNilePUA-Bold", it will get Times-Roman rather than the intended font. All system UI font access should be through proper APIs such as CTFontCreateUIFontForLanguage() or +[NSFont systemFontOfSize:].
2024-05-17 11:56:24.978 system_profiler[1061:15889] CoreText note: Client requested name ".AlTarikhPUA", it will get Times-Roman rather than the intended font. All system UI font access should be through proper APIs such as CTFontCreateUIFontForLanguage() or +[NSFont systemFontOfSize:].
2024-05-17 11:56:24.982 system_profiler[1061:15889] CoreText note: Client requested name ".AppleColorEmojiUI", it will get Times-Roman rather than the intended font. All system UI font access should be through proper APIs such as CTFontCreateUIFontForLanguage() or +[NSFont systemFontOfSize:].
2024-05-17 11:56:24.985 system_profiler[1061:15889] CoreText note: Client requested name ".AppleSDGothicNeoI-Regular", it will get Times-Roman rather than the intended font. All system UI font access should be through proper APIs such as CTFontCreateUIFontForLanguage() or +[NSFont systemFontOfSize:].
2024-05-17 11:56:24.988 system_profiler[1061:15889] CoreText note: Client requested name ".AppleSDGothicNeoI-Medium", it will get Times-Roman rather than the intended font. All system UI font access should be through proper APIs such as CTFontCreateUIFontForLanguage() or +[NSFont systemFontOfSize:].
2024-05-17 11:56:24.991 system_profiler[1061:15889] CoreText note: Client requested name ".AppleSDGothicNeoI-Light", it will get Times-Roman rather than the intended font. All system UI font access should be through proper APIs such as CTFontCreateUIFontForLanguage() or +[NSFont systemFontOfSize:].
...

200-odd such lines.
So I reinstalled matplotlib==3.8.4.
Please advise: are there functions in font_manager.py I can call to help debug this
or caches / .jsons I can delete ? Thanks