The good news is a 2013 Macbook Pro Retina with the 750m can handle the game at full Retina resolution (2880x1400)!
The bad news is some things are wonky. The launcher definitely isn't Retina, and all the text is really small in places like systems. I adjusted the UI scale to 2.0x, so that's helped a bit, but other places are still a little rough.
The resolution independence needed for a "Retina" app depends upon some OS X API stuff. I wouldn't expect a Windows app running in a translation layer to ever achieve that. Using the UI scale is probably the best thing to do once you're in game, but the launcher just kind of is what it is.
Good news about the 2013 Retina, but I figured the high end model with the discrete graphics would be fine. What I'm interested in is how the low to mid range ones with Iris and Iris Pro do.
I seem to be having an issue with the game being stuck in Half-Resolution. It's on by default, and I can't even toggle the "off" button; nothing happens. No matter what I set the advanced settings or my monitor's resolution to, I can't turn off the Half-Resolution option. I didn't have this issue when playing under a Wineskin prior to the beta.
Decided to give this a whirl on my hackintosh. I didn't spend a lot of time with it. It crashes a fair amount, even at the launcher. Performance does indeed seem better than in Wineskin, so that's a plus.
I will point out that anti-aliasing doesn't work (Nvidia GT650). You can turn it on, and it disables a bunch of post-processing options, but it doesn't actually work. So that's a bit of a bummer, cause jaggies aren't nice.
I also noticed that bloom/high often disappears. Sometimes the option is there, sometimes it's not (only off and low). Not sure why. Also noticed that the 'GPU-accelerated particles' option is off and cannot be toggled on.