Have you tried the Mac bug forum?
For problems installing or patching the Heroes, connecting to the game, or crashing on Mac.
Sky temple mid lane, Battlefield of eternity almost all the map is bugged, specially the mid/bot portion of the map, Blackhearts bay most of the bottom lane is bugged af, Alterac pass is bugged arround the water holes that separate objectives, Hanamura is bugged only arround the circle areas where the obj spawns and where the obj ends. The rest of the maps don’t have this visual bug or at least not to the point of being unplayable like these other maps i mentioned before. Maybe you guys could ch…
The game is an absolute mess on Macs that have Intel Iris or Intel HD graphics, has been for over a year. Lucky you managed to play without issues even this far.