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I intend to connect my old full HD TV as external display to a mid-2012 MacBook air.

While being "only" 1920×1080, the TV has 42", so each element would look ridiculously large. So I thought about "emulating" it to be, say, 4k, then downscale the signal to the 1080 the TV can handle.

Is there such a possibility?

  • MacBookAir5,1
  • Mojave 10.14.6
  • Intel HD Graphics 4000 1536 MB
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1 Answer 1

Reset to default
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Assuming you want to extend your desktop and not just mirror it: The Mac does this by default, for more fine grained options go to System Preferences → Screen, a window for the TV will appear, where scaling options is avaliable. For even more options hold down the Alt/Option key while clicking on "Scaled"

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  • Hello @Harker, thanks for the tipp with pressing "alt". True, I can set the resolution below the screens capability, but my aim is to set it ABOVE (as far as apps are concerned) and downsample right before sending to HDMI.
    – Zsolt Szilagy
    Sep 30, 2019 at 17:41

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