This question has probably been asked to death already, I don't know yet...but when plotting using the Quartz framework on OS X, labels do not show up unless the sans font family is selected beforehand.

My question is, how do you permanently change the default fonts for plots to "sans"? I tried changing the quartz options in the preferences pane of the R.app application, but the option to change font families under quartz is not selectable. 

Is there a way to maybe change the fonts.conf file located in the fonts folder in the RHOME folder? 

Basically, I want the default fonts set to sans under quartz to that axis labels show up properly.

Thanks
 

The most perfidious way of harming a cause consists of defending it deliberately with faulty arguments.
  - Friedrich Nietzsche


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