BUG: OSX backend, Figure.set_dpi() gets confused on retina display #6501
Description
On v2.x, with ipython --pylab=osx:
plot([1,2,3])
gcf().set_dpi(115)It now displays the result with an image size based on true dpi rather than pixel-doubled dpi used originally. Subsequent attempts to change dpi result in nothing being plotted.