Earlier quoted context omitted.
I'm still seeking a good way to do reviews/merges with Vim though. I use a Macpro Ret 13" and it nicely fits two ~80char windows. However, three windows as vim normally does for merge conflicts/etc is too much for the 13" screen, it ends up cluttered and cramped. Anyone have any recommendations for how to efficiently handle conflicts/reviews via vim with a small screen?
I am surprised that your highres screen doesn't handle three buffers side by side. My 13" 720p laptop also has trouble with three buffers, but I was hoping that would be mitigated the day I got a highres 13" laptop. Anyways, you can try a narrow width font: I love M+ 1mn, though the narrow width causes problems when it doesn't have a certain unicode point defined and falls back to a full width font..
Note that OSX by default has some type of feature that reduces the realestate you have available.. don't ask me to explain it, i haven't really used it much.
Basically, with the Retina monitors, the resolution is actually too high for a lot of scenarios. You end up with tiny fonts, tiny icons, etc. So they somehow sample/zoom the sizes so that you get both really crisp renders but with very few real pixels on screen.
This may be what is causing you to be surprised that i am still having issues with a high resolution Retina screen. But, turning it off would be effectively the same thing as just turning my iTerm2 fontsize to ~8-10 or something tiny, allowing me to fit three panes.