Ralf Herrmann (via Michael Tsai):
Apple has recently licensed fonts from type foundries such as Commercial Type, Klim Type Foundry and Mark Simonson Studio to be used as system fonts on Mac OS Catalina. But since these fonts are an optional download, many users of Mac OS X are not even aware they have access to them for free.
I had no clue that so many great type families were made available for free to Catalina users. Interestingly, they aren’t stored in the typical folders for fonts —
~/Library/Fonts; instead, they are downloaded to
/System/Library/AssetsV2/com_apple_MobileAsset_Font6. However, they appear to be saved as standard TrueType containers, and I don’t see any restrictions on their use for commercial projects in their metadata or the Catalina EULA (PDF).