Since High Sierra, or possibly earlier, macOS has been bundling fonts in /System/Library/Fonts that are 'installed, but hidden'.
That is, they are unavailable to most apps, and not shown in FontBook or the macOS font selector window.
These include Athelas, Marion, Iowan Old Style, Courier, and Times. (Courier New and Times New Roman are different fonts.)
Does anyone know why Apple is doing this? I can't find any announcements or documentation about it.
All these fonts are .ttc TrueType Collections, which contain all the styles in one file. Copying them to /Library/Fonts or the user font folder still doesn't make them show, but if you convert the collection to individual files for each style, then they do appear in FontBook and font lists.
Whether there's a problem having "duplicates", even if one of them doesn't really exist, I don't know.
That is, they are unavailable to most apps, and not shown in FontBook or the macOS font selector window.
These include Athelas, Marion, Iowan Old Style, Courier, and Times. (Courier New and Times New Roman are different fonts.)
Does anyone know why Apple is doing this? I can't find any announcements or documentation about it.
All these fonts are .ttc TrueType Collections, which contain all the styles in one file. Copying them to /Library/Fonts or the user font folder still doesn't make them show, but if you convert the collection to individual files for each style, then they do appear in FontBook and font lists.
Whether there's a problem having "duplicates", even if one of them doesn't really exist, I don't know.