When I run mame os x full screen on an imac, it works fine but is in 4:3 so there are black borders at the side. Under preferences/video, I have Scanlines 50% on and switch resolutions on too.
If I turn switch resolutions off and then go full screen, it runs without the black borders but without the scanlines so the graphics looks blocky/rubbish.
Any way to run full screen with no borders, but with scanlines?
Any help would be much appreciated.