How to set Desktop Scaling to monitor(s) on macOS High Sierra+

How to scale your monitor resolution more than the native 1080p.

https://unsplash.com/photos/p-xSl33Wxyc

Environment

macOS High Sierra+ / Mojave / BigSur

Issue

You would like to easily set Mac Retina display(s) to higher unsupported resolutions.

Resolution

• Free — RDM
• Shareware $14 — SwitchResX

Root Cause

macOS X only natively supports HiDPI modes on monitors with the most common Aspect Ratios.

More details — Guide: Fixing External Monitor Scaling and ‘Fuzziness’ Issues with MBP and OSX

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