Enable compatibility for HiDPI ("Retina") displays on macOS

[randomizer52]

TL;DR

Add one key-value pair in Info.plist to enable non-pixellated native HiDPI mode on macOS.

What ?

In /Applications/factorio.app/Contents/Info.plist, add the following:

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<key>NSHighResolutionCapable</key>
<true/>

Why ?

This enables high-DPI mode on Mac apps. Factorio actually works very well with this mode enabled; after changing Options > Interface > UI Scale to 200%, the game displays perfectly on my 4k monitor running in 1080p HiDPI.
This is a very simple change with drastic effects on the polish and feel of the application.

For comparison, see attached screenshots (both 4k). View in native file size to see the difference.

To test locally, edit /Applications/factorio.app/Contents/Info.plist as detailed above, then execute

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sudo touch /Applications/factorio.app

in Terminal. This breaks Gatekeeper, of course, so you have to manually approve the edited application.

[IIPoliII]

I am quite surprised that this was still not fixed and that your fix still works. Maybe the devs could add those lines ?
It does the same for me on a MacBook Air M3 2024.

[Loewchen]

Not sure I understand the issue, can you not just set it to "render in native resolution" in graphic settings?