I think Apple manages the graphics drivers for you on MacOS. Unless you're using a Hackintosh or eGPU, out-of-date drivers aren't usually a concern on MacOS as long as you're using the most up-to-date OS release. With that said, the current stable for Mojave seems to be 10.14.4, while the OP is using 10.14.3 so....
I cannot reproduce the lighting issue on my Mac. However, I did notice a weird issue when scrolling in the overworld formicarium. Scrolling down to the bottom in the formicarium overworld leads to a black screen but with UI elements intact (scroll from "normal-scroll.jpg" to "black-scroll.jpg").
Another graphics issue I see on a Mac seems to be a transparency issue. See comparison between "formicarium-tank-macos.jpg" and "formicarium-tank-windows.jpg". The tank borders are completely black on Mac instead of the blue-green glass on Windows. I haven't tried the game on Linux yet, though.
In any case, here are the specs for my MacOS machine:
MacBook Pro (15" 2017)
Core i7 2.8GHz
16 GB RAM
Intel HD Graphics 630/Radeon Pro 555
Side note: My Windows machine(s) isn't my MacOS machine, and my primary Linux machine is another one, just to be clear.
Edit: Anything outside the formicarium's edge background for formicarium overworld #1 seems to be completely black on MacOS, so if there's a "suddenly visible" glass while scrolling down to the bottom edge of that map (formicarium-borders-macos.jpg), it's probably the same issue.
Hi - I looked into updating the drivers and apparently The graphics drivers are built into the Mac operating system and that updating to the latest OS release will install the latest drivers. https://support.apple.com/en-us/HT201541
Specs for Mac are:
MacBook Pro (Retina, Mid 2012)
2.3 GHz Intel Core i7
8 GB 1600 MHz DDR3
Intel HD Graphics 400
0 1536 MB
Any other advice on fixing the lighting / brightness issue i've been having?
Try System Preferences > Accessibility > Display > Invert Colors. I don't know whether it also affects the colors in-game though, since I've just refreshed my Mac install and most of the stuff I had installed is gone.
I have a vibe that this is a driver problem, but apparently the mid-2012 model still has Metal support, so I'm not sure. Is this the 13" or 15" model? Only the latter has a discrete graphics card and some brilliant Apple engineer thought it was a good idea to not include that particular detail on the standard specs page (you'll need to dig into System Report > Graphics/Display to get the discrete graphics model, if it's there at all).
Same problem here on Linux.
OS: Linux Mint 18.3
Graphics: GeForce GTX 770
I'm using the latest proprietary driver from Nvidia
When I start a game, there seems to be a 50/50 chance that the graphics on the surface glitch like this. Best solution is to completely close the game and start again. Seems like it can happen on any level, but I have not observed it happening underground. The leafy jungle of the leafcutters does seem to be worse than other levels (or maybe when it happens its just harder to ignore because of the environment). It isn't always the same. Sometimes the problem is minimal and just a nuisance, othertimes you can barely see anything. But the problem seems to target dark textures the most, which will instead light up with colors. Sometimes it's mostly normal and only few spots on leaves or certain bugs.