2019.3 MacOS native dark mode support

[PendingFox]

So umm…

NSRequiresAquaSystemAppearance <Boolean> NO

This is all it takes to make the window caption dark on MacOS when the dark mode is on. Btw you can manually add that to info.plist right now and restart the editor to make it work.

Please?

Thank you.

[User340]

Thank you for the tip! Works on standalone builds too.

[Lars-Steenhoff]

I have been using this even for the light mode.