From what I've read OpenGL actually isn't a good fit for efficient 2d rendering that isn't a polygon. Apparently Mac developed a QuartzExtreme2d backend (now called QuartzGL) awhile ago but never got it working well enough to make default. So, they use the cpu like everyone else who isn't windows, or happens to have a blitter.
Originally Posted by elanthis
So, unless you want to extend your complaints of FOSS cluelessness about graphics hardware to Apple, you might want to say, rather, that Windows created an accelerated api that seems to be uniquely able to handle 2d.