In all dropdowns both in the browser and in the system the checkmark has disappeared. This is macOS Sierra and every dropdown in Chrome, Safari or any app looks like this:
Anything I can do? I tried rebooting. Also I had San Francisco Developer version installed, removed it, nothing changed. Installed the latest macOS public beta, nothing.
Restore System Fonts but it did not find any problems.
In fact right after that I have installed the new macOS beta and it got fixed. Maybe all I was needed is to reboot after restoring system fonts. So I am marking this as solved.