When running the game on a retina display in macOS 10.13.5 (and Mojave, but not currently using it) the game runs at a max resolution of 3360x2100 instead of what my display actually supports. This is a HUGE drain on performance for some. Going fullscreen with the correct resolution works, however choosing the native macOS fullscreen option causes the 3360x2100 resolution to activate. On top of that, the fullscreen resolution slider.
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No, it doesn't. My machine's max resolution is not 3360x2100, it's 2880x1800, so why on earth is the game playing at such a ridiculously high resolution? I don't even keep my scaling setting at that - it's meant to be scaled to look like 1680x1050. Attached is the Displays section of "About this Mac"
[media]When it says it "scales to look like 1680x1050" it actually changes the desktop resolution to 3360x2100.
A: Just switched to the Vanilla launcher, same issue (no surprise) because it's an in-code issue.
B: If it changes the resolution to that high and Mojang is using it, they need to also utilize LWJGL's getPixelScaleFactor() instead of blatantly ignoring it - this is a new bug added since the LWJGL 3 update, and it needs to be addressed or else a large portion of the community playing on a Mac will have godawful performance.
There is no bug here. Like I said in the first post, the game runs at the full resolution of the display due to the fix for MC-32327.
No worries then. I'll have a Forge ASM fix for this when 1.13 comes out and Forge accompanies it. Leave it to the modding community to fix the game like usual ¯_(ツ)_/¯
Wouldn't be nearly as bad if it weren't for the AWFUL transition out of the game when alt-tabbing in Minecraft's fullscreen mode. The whole minimize thing is slow and distracting.
The transition is due to the change in resolution from macOS's end. This can all be turned off in system preferences. You are welcome to use the new FS resolution slider to change the resolution if you don't want it to run at the desktop's resolution, but it will cause this effect.
I'd like to leave this alone, but the bug is even worse.
I'm using my MacBook with a 4K monitor. It's SENSELESS for the game to try to play it at 2x resolution (7680 x 4320) and playing in full screen isn't a good option. Changing fullscreen resolution makes alt-tabbing take forever because it's changing the screen resolution back, and doing some minimize effect. Plus if in macOS's fullscreen and choosing Minecraft's fullscreen option, the game crashes.
Essentially, I question if the implementation of 1.13 on macOS was ever tested... I'd love to play it, but it's just unreasonably difficult to do so.
Works as intended, due to the fix for MC-32327.
Edit: shouldn't be WAI, instead Invalid due to modified launcher