macOS: Erroneous "Vulkan 1.2 is not supported"

[ichordev]

I get a crash with a message that Vulkan 1.2 is not supported when running v0.3.5 in Minecraft 1.20.1 using Fabric Loader 0.14.24. I'm using an Apple M1 Mac-mini running macOS Sonoma (14.1), this setup should support Vulkan 1.2.

I believe the culprit might be that the MoltenVK version distributed with the mod is outdated. Manually updating the included binary to MoltenVK v1.2.4 fixed this issue for me, and I could run the game mostly without issue:

[mvk-info] MoltenVK version 1.2.4, supporting Vulkan version 1.2.250.
	The following 90 Vulkan extensions are supported:
		[... a long list...]
[mvk-info] GPU device:
		model: Apple M1
		type: Integrated
		vendorID: 0x106b
		deviceID: 0xe0103ef
		pipelineCacheUUID: 4C6BFBEB-0E01-03EF-0000-000000000000
	supports the following Metal Versions, GPU's and Feature Sets:
		[... a long list...]
[mvk-info] Created VkInstance for Vulkan version 1.2.0, as requested by app, with the following 2 Vulkan extensions enabled:
		VK_KHR_surface v25
		VK_EXT_metal_surface v1
[mvk-info] Vulkan semaphores using MTLEvent.
[mvk-info] Created VkDevice to run on GPU Apple M1 with the following 1 Vulkan extensions enabled:
		VK_KHR_swapchain v70

The only problem being that the game immediately crashes if "Indirect Draw" is enabled while playing in a world. Using MoltenVK v1.2.6 mostly worked, except that while in a world the UI was upside-down and text rendered back-to-front—probably just a binary compatibility issue.

[Tokarak]

https://github.com/xCollateral/VulkanMod/blob/dd638f0d97d64e19dea83c79ae347127f81ed789/build.gradle#L35-L37 Looks like lwjql needs a version bump to 3.3.3. See release notes — https://github.com/LWJGL/lwjgl3/blob/f0ec1437a6149dae00eaa27c47268e5e4efb129f/doc/notes/full.md — MoltenVK bumped to 1.2.5.

[thr3343]

https://github.com/xCollateral/VulkanMod/blob/dd638f0d97d64e19dea83c79ae347127f81ed789/build.gradle#L35-L37

Looks like lwjql needs a version bump to 3.3.3. See release notes — https://github.com/LWJGL/lwjgl3/blob/f0ec1437a6149dae00eaa27c47268e5e4efb129f/doc/notes/full.md — MoltenVK bumped to 1.2.5.

Unfortunately we can't use 3.3.3 as Mojang haven't updated to 3.3.3 yet Also/Adiditionally most launchers override the LWJGL version to 3.3.2 afaik So as a result we are usually limited to what the launchers support/allow.

[Tokarak]

We wait for death’s shrill Whistle that tells us to climb, to rise, To run and to die.

[thr3343]

In short, LWJGL 3.3.3 is definitely possible As long as the given launcher allows using a LWJGL version higher than 3.3.2 afaik