Half-resolution on MBP Retina.

EXPECTED
The game should run in full resolution on MacBook Pro Retina (2880x1800 for fullscreen on 15").

OBSERVED
The game runs in half resolution: each pixel is displayed as 2x2 physical pixels. This affects both fullscreen and windowed modes. So the fullscreen resolution is 1440x900 on MBP 15.

I only play in fullscreen, so as a workaround I tried to force the correct resolution in options.txt (fullscreen:true, overrideWidth:2880, overrideHeight:1800) but it had no effect.

Options file attached. Log file doesn't seem to contain anything relevant so I didn't attach it.