Trying to install fonts to Font Book (Mac) using the Terminal
Solution 1:
/System/Library/Fonts is restricted with System Integrity Protection, since this folder is intended purely for macOS built-in first-party fonts.
Instead, choose one of the following locations depending on your intentions:
-
/Library/Fontsto apply to every user, existing and newly created. -
~/Library/Fontsto apply to the current user. -
/Library/User Template/Non_localized/Library/Fontsto apply to new users.