

The game did not crash it just would stay on the white screen forever until I closed it. And when I used it on the default Minecraft there were no other mods. The only mods I used were Lunar Client and Badlion Client. It is preinstalled on Lunar Client and Badlion Client and on the default Minecraft launcher I put Optifine 1.8 L5 in the mods folder. I've used it with Lunar Client (which has Optifine preinstalled), Badlion Client (which has Optifine preinstalled), and on the default Minecraft launcher. The versions I've tried are 1.7 and 1.8, but it most likely affects other versions. By going to Settings > Video > Other > Fullscreen. To get to this bug you have to be on Mac (I assume it doesn't affect windows, but I don't know) and go into Optifine fullscreen.
OPTIFINE FOR MINECRAFT MAC UPDATE
Before the Big Sur update on Mac, it would work perfectly fine. It may affect other versions but I have not tested it. As far as I know this bug effects 1.7 - 1.8 Optifine. Accessible by going to Settings > Video > Other > Fullscreen.) Although it is still playable without using Optfine's fullscreen I get worse fps and since I use a different resolution my GUI scale is messed up. When going into fullscreen on Optifine (this doesn't happen in vanilla Minecraft) it will give you a completely blank white screen (Not Mac's native fullscreen setting, Optifine's fullscreen.
