Render resolution exceeds window dimensions on some macOS systems, causing performance issues

This is because MacOS lies about the resolution to user and programs. Retina means 4x standard resolution, but scaled up so effectively everything should remain the same size, but more detailed.

Dam you MacOS and your lies.

So is this out of your guys control?

I know I personally would love to see it go back to the old way, where MineCraft just matched the screen resolution or at least the "scaled" version rather this insanely high retina version 

Our Mac screens are 3840x2400(4K) and not 2880x1800, take a desktop screenshot and look at the Resolution, that will answer your question.

What I would like to add is that, even if I choose a Resolution on the Minecraft launcher, that Resolution does not translate to in-game Resolution, It only resizes the game window to that Resolution based on the Resolution you chose in the System Preferences. Meaning my display is set to Look like 1200p(16:10) and I like to play the game at 1778x1000(16:9), because I stream at 16:9. What the game is doing is Doubling the resolution I want and giving me an in-game Resolution of 3556x2000. That is ruining the fps, heating up the computer and looking exactly the same as if I was playing it at 1000p. 

Would it be possible to Mojang to change this Resolution problem? I play Windowed at the setup mentioned above, and judging by other peoples comments, we would like to play how it was before, If I want 1280x800 or 1920x1080, the window size and in-game resolution should be as expected.

Fullscreen users now have the ability to change the Resolution to their needs.

I agree with Jake here.

Macbook pro 15" Screen resolution: 2880 x 1800

Settings Scaling: 1680 x 1050

Screenshot of screen: 3360 x 2100

MineCraft 1.12.2 Fullscreen: 1680x1050 (matches my scaling) When I fly around with vsync off, i get around 100-120 fps. If I change my computers resolution back to default scaling MC1.12.2 runs at a resolution of 1440 x 900 (which is macs default scaling)

MineCraft 1.13 Fullscreen: 3360 x 2100 matches retina? But why? That servers absolutely no purpose, If I fly around with vsync off i get about 55 fps. If I change my computer back to default scaling in the options, then MC1.13 goes back to 2880 x 1800... but then I have to constantly bounce my scaling around. I prefer the smaller things on my screen, as the default is much too big.

I just do not see how it servers any purpose to use apples Lie of a retina resolution, when clearly the screen has 2880 x 1880 pixels. I can't see more than that, so why force my game into a resolution of 3360 x 2100?

I really hope you guys take the suggestions from the people who are playing on mac, and change it to NOT match the resolution of retina (as it servers no purpose) but the revert back to what 1.12.2 did and match the scaling of the computer itself.

This is most likely due to an update to LWJGL 3. The only solution I can give you is to use the FS resolution slider or to use a third-party program to manually set your resolution to 1680x1050 without HiDPI scaling (I use RDM and it works for my macbook)

Hey Matthew .... I installed RDM and it works like a charm.

Thank you so much 🙂

Using the fullscreen resolution slider give more problems than it solves on mac. Since fullscreen is usually defined by MacOS itself, and not by the application. This makes the minecraft fullscreen mode + the MacOS fullscreen mode two different things. For example, there will be a massive delay when trying to do something else (like check a picture of an object I'm building) when playing minecraft since the computer has to change it's resolution to finish the task. The correct way of implementing the feature would be to change the games resolution, and not the computers resolution. Due to this, game is unplayable on most retina MacBooks, and any weaker systems.

I added a comment to https://bugs.mojang.com/browse/MC-32327 because that 'fix' broke minecraft performance for me on my late 2013 laptop. I wonder how many kids out there are complaing to their parents about a hot laptop

is a '2x scale' option to retain high FPS on high resolution screens too much to ask for? effectively returning 1.12 behaviour but more accurately describing the workings

Please check if that's still an issue for you in Minecraft 1.14.3 Pre-Release 2.

same behavior for me in 1.14.3 Pre-Release 2

(windowed mode clearly uses lcd native dpi where i want to play at reduced dpi , ie. scaled up

No change in behaviour. Still plays at full retina resolution which causes the system to run very hot and slow.

Well my email decided to put this in the junk folder, so I wasnt getting updates. Fixed that issue, anyways I can confirm with these other guys, also running at retina resolution, computer revs up quite quickly. 

Im probably going to have to create another issue because since this preview, the sync has just been way off, the game stutters as you are moving around. (vsync = on)