sorry if this has been asked before, but I can't find any exact answer digging around

Basically, I can't get scanlines without antiliasing...(both fullscreen and windowed modes).
I'm running ver. 1.53(113) on multiple Macs, different OSX versions and embedded/external monitors...seems a feature of the application rather than a scaling issue. I tried tweaking OpenGL or Core settings but nothing changes.
Here an example of what I mean:
No scanlines
TV-Mode
Is there any way to enable scanlines without antialiasing?
Thanks a lot!