Screen resolution stuck in low Rez

Ever since installing the new patch the game is stuck in low resolution on my 5k iMac Pro. The game runs appallingly and has made the game completely unplayable!

What issues are you getting as the game seems to have zoomed in all of a sudden and the game as you have stated is unplayable. The game res in my settings is on the highest.

The game is stuck in 1080p on my imac pro and runs like its in treacle. A month ago it ran fine and at 4k…