Mac

I just downloaded for my mac, and in the log in/character select screen into Twilight Strand, my screen is flashing green. When entering TwiLight Strand, thinking it would improve after the login screen, the waves then
continually flashed bright blue. I was also unable to see Hillock or some of zombies that started to spawn. Right now, for me the game is unplayable after trying to pick a gem after the first quest I needed to look away form my screen because it becomes too much.