I'll try my best to explain what is happening here. I am currently using a macbook pro with retina display. By default MacOS runs in a 2880x1800 for my laptop with the GUI scaled to a 1440 x 900 size. On previous versions of minecraft, the game actually ran in 1440 x 900 which was perfect, but now it does not scale and runs in the full 2880 x 1800. My laptop can run it but not very well. I could go into the game settings and change the resolution, but currently that button doesn't work at all. Also V sync is not properly functioning. There is massive screen tear with it on. Is it possible that the game will return to the old method of resolution? I'm assuming this is just a bug but I am not entirely sure. I hope this makes sense. I can try to explain what I mean better with a video if you would like. Thankyou!

P.S. if you were wondering if maybe this issue is caused because I am on a beta MacOS software, this issue occured on a stable version of MacOS as well.