I'll have to try the low graphics mods. Does Paradox have a patch in mind for Mac users? Maybe they can simply remove the 3d models of the map edge, counsellors, levies, cities, replace them with 2d models. It'll look worse, but I don't play CK2 for how pretty it looks. I don't know anything about coding, I admit, so I really don't know if this will even do anything.
I suppose my graphics card is rather low end for the game - are there any Mac users who have sufficient video cards to not have to suffer through flickery death and terrible lag, at this point?
On the subject of not running two OSs at once, I used Parallels, not Bootcamp (should of, but didn't hahah). So it really was two OSs at once. I could split my screen in half and do Mac stuff and PC stuff at once. Fun, but slowed everything down a bit.