JT potato

This bug has been around since 2017 and nobody has even been assigned?

This is definitely still an issue. It's been the same since 1.13, and I'm kind of getting annoyed that nobody's doing anything about it.

I get that this is a "fix" for another issue you had, where people were complaining that the resolution is halved.

Lower-performance Macs aren't able to run Minecraft Java at 2k, let alone 5k on some Macs. To satisfy the people with Retina displays and power, and the people that just have retina displays, I suggest you have an option to toggle between the 1.12 behaviour and the 1.13 behaviour of display scaling.

In fact, after more testing, this issue effects displays that AREN'T Retina. I have a 4K monitor, and everything is tiny on it, but when I scale it up and launch the game in 1080p, the game is rendering to 4K (check in the F3 menu). If I use display scaling again and scale it so that text is even bigger, The game gets to render at even higher resolutions, even though it still takes up the same amount of pixels on the screen.

This definitely is not the place to put server errors.

This could be an issue in the beta. (I haven't tried it yet) but however, betas are normally unstable. Wait until the stable update if you have worlds you care about.