Gruber seems to think that they have been developing an in-house font called Apple Sans: http://daringfireball.net/2014/06/wwdc_2014_prelude http://daringfireba

Gruber seems to think that they have been developing an in-house font called Apple Sans: http://daringfireball.net/2014/06/wwdc_2014_prelude http://daringfireball.net/2014/06/wwdc_2014_prelude