Since upgrading my late 2014 iMac to Mojave load times on Civ 6 have gotten ridiculous. Takes maybe 5 mins of initial loading screen but then actually loading a game and waiting for the round blue play button takes 20-30 minutes. Once the game is actually running it is prone to crashing after anywhere between 0-30 minutes. iMac has 2.7ghz quad core intel i5, 8GB ram, Intel iris pro graphics and latest Mojave version. Running OpenGL game option and all expansions but no mods. Any tips on debugging this problem would be greatly appreciated.