Can't disable fonts in Font Book after fresh Mojave install I just finished installing macOS Mojave on a brand new 2018 MacBook Pro.

One of the first things I usually do is disable all unnecessary fonts.

This time, the option to disable the font is grayed out for every single font.

In the Finder the file permissions are as follows:

system: Read &amp; Write
wheel: Read only
everyone: Read only


How can I disable fonts in Font Book on OS X Mojave?
It turns out that (as far as I know), Font Book in Mojave just does not allow disabling of the default fonts.

There are two main locations where fonts are stored under Mojave:

/Library/Fonts/


/Library/Fonts/ contains all the general use fonts, available to all users. These are the fonts I wanted to disable.

/System/Library/Fonts/


/System/Library/Fonts/ contains fonts that are necessary for the system.

I simply moved all the fonts from /Library/Fonts/ to /Library/Fonts (disabled)/

It went fine and the system has not complained so far.

I did leave copies of the standard web fonts: Verdana, Times New Roman etc.