In case someone else is experiencing frequent crashes in Mac, this is what I did in order to make the game bearable: - As is discussed in another thread, you can enable larger resolutions by going to System Preferences -> Display and then setting resolution to "Scaled". I've been using 1680x1050 and it seems stable (the fans might get pretty loud though).
- As for the frequent crashing while saving or switching between areas, it seems that the resolution setting doesn't have a noticeable impact on stability. Instead, what appears to be causing frequent crashes on my system is having the graphics settings above low when saving or switching between areas. So what I ended up doing is just setting the graphics slider to low before saving or moving to a new area and then just moving it back to medium after loading is complete. This is somewhat annoying, but has eliminated the crashes completely, and it's much better than having to restart the whole game.
Considering these symptoms, it seems that there could be a particular graphics setting that doesn't get along too well with saving/ map transitions, so maybe Obsidian could explore these possible fixes:
Providing a more granular graphics setting menu, so that we can turn off the offending setting by itself instead of just setting everything to low.
Programmatically apply the fix described above on affected systems. That is, automatically turn down graphics settings before saves/transitions and then restore original user settings.