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  • Thanks! I was trying to figure out why this wouldn't work, and I don't have a HiDPI device to test. The answer is, as you mention, that xrandr scaling works via bitmap. The blurriness I get on a lower DPI screen would remain. Guess we'll have to wait for a more complete solution. Commented Mar 25, 2013 at 23:17
  • The solution is, as I mentioned, setting appropriate DPI and using large font size and artwork. AFAIK that's exactly what Apple does. Commented Mar 25, 2013 at 23:57
  • Actually Apple now does scaling. E.g. on a 32-inch XDR-Pro display with a native resolution of 6008x3384 pixels, the resolution in macOS is just 3008x1692. One visible UI pixel is 4 display panel pixels. You can force macOS to use the full resolution (which is possible in at least Monterey 12.1) by holding the "option" key while clicking on the "Scaled" button in the Displays preferences panel, and scrolling up on the list for the "hidden" full res choice. Then you'll see tiny fonts, minuscule icons, etc. X11 mostly does much better than Apple, despite needing some tricks to make it work. Commented Jan 15, 2022 at 8:17