
If you attempt to use them differently, they will not work! These fonts will only work as Helvetica Neue system replacement fonts.Do not download if you don't have a paid Apple Developer Program account. You must be a registered Apple Developer to use these fonts.I assume no liability for improper installation or improper use.I assume no copyright over these fonts.The original system fonts are not deleted or modified in any way. Because the font folder /Library/Fonts takes precedence over the fonts which are in /System/Library/Fonts, these specially crafted fonts are used for the user interface instead of the real system fonts.

These San Francisco fonts have a special name table with names identical to those of the system fonts.

Run sudo chown root:wheel /Library/Fonts/System\ San\ Francisco* to set the proper ownership of the font files.(protip: press cmd+shift+g while in Finder to type the path directly.) Important note: this is the /Library/Fonts folder, not ~/Library/Fonts. Copy the 5 font files to /Library/Fonts on your Mac.Ruby -e " $(curl -fsSL ) " Manual Install:
