horay! temporary is great. thank you very much.
I'm quite sure that this is a temporary fix for Sierra users. In version 11.0.0 it would crash. in 11.0.1 it was disabled, in the next update it should be back to work. You can style strings in e.g. plots using Style and supplying a FontFamily option.
(non-proportional, to be clear i mean a font which has a set width and height. (some fonts change size to fit the page, thus cannot be used for lining things up in a table))