This repo is archived. I recommend anyone who is still using this repo to switch to ManyMC which includes these patches as well.

m1-multimc-hack

NOTE: You will need to visit the "Version" tab in MultiMC for the script to properly detect the version of Minecraft you're running.

Optifine fix is HERE! Optifine used to cause a NSWindowInconsistencyException during launch. Full error here:

WARNING: NSWindow drag regions should only be invalidated on the Main Thread! This will throw an exception in the future. Called from (
	0   AppKit                              0x00007fff32319e39 -[NSWindow(NSWindow_Theme) _postWindowNeedsToResetDragMarginsUnlessPostingDisabled] + 371
	1   AppKit                              0x00007fff323444fe -[NSThemeFrame setStyleMask:] + 137
	2   AppKit                              0x00007fff3234434c __25-[NSWindow setStyleMask:]_block_invoke + 1908
	3   AppKit                              0x00007fff32343b7e NSPerformVisuallyAtomicChange + 132
	4   AppKit                              0x00007fff32343a89 -[NSWindow setStyleMask:] + 184
	5   liblwjgl.dylib                      0x000000011434bcca Java_org_lwjgl_opengl_MacOSXDisplay_nSetResizable + 90
	6   ???                                 0x0000000114ced407 0x0 + 4644066311
	7   ???                                 0x0000000114cdcffd 0x0 + 4643999741
)

The cause is the [NSWindow setStyleMask:] call in the function Java_org_lwjgl_opengl_MacOSXDisplay_nSetResizable. It was fixed by just adding a function call to run [NSWindow setStyleMask:] on the main thread.

Want to get Minecraft running natively on a Mac with an M1 "Apple Silicon" chip? Thanks to the excellent work by Tanmay Bakshi, it's possible!

This repo contains a wrapper script to be used with MultiMC that will configure any MultiMC instance to use the Apple Silicon native libraries from Tanmay's work. All you have to do is set the wrapper command and make sure you're using an M1-compatible JDK, and it should just work. This fork should automatically be compatible with all versions of Minecraft and is compatible with Forge based modpacks as long as you use Java 8 instead of 11.

Setup and Usage

Pre-requisites

First, install the Zulu Java 8 JRE for macOS ARM64 for 1.16 and below. Next, install the Zulu Java 16 JRE for macOS ARM64 for 1.17 and above.

You'll also need a standard install of MultiMC.

Clone this repo

Open a terminal (it's in the Utilities folder inside of Applications, if you're new to command line stuff).

To make it easy to follow along, we'll make a new directory called Minecraft in our home folder. If you'd rather put this repo somewhere else, that's fine - the location doesn't really matter. If you do put it somewhere else, remember to change the references to it in the commands below.

The lines beginning with # below are comments and don't need to be entered, but it's fine to copy paste them in along with the rest.

# Make a place to put our wrapper script and libraries
mkdir -p ~/Minecraft

# enter the new directory
cd ~/Minecraft

# clone this repo
git clone https://github.com/r58Playz/m1-multimc-hack.git

Configure MultiMC

Go to Settings, then navigate to the Java tab on the right. Then hit "Auto-detect".

It should open a window with a list of Java versions. Find the one that says "zulu-8" in the path and select it, then hit OK. (You may need to resize the window to see the full path.)

Still in the Settings pane, switch to the "Custom Commands" tab. In the "Wrapper Command" box, enter the full path to the mcwrap.py script from this repo, e.g. /Users/your-username/stuff/m1-multimc-hack/mcwrap.py.

An easy way to get the full path (assuming you put this repo in ~/Minecraft) is to open a terminal and enter:

ls ~/Minecraft/m1-multimc-hack/mcwrap.py | pbcopy

This will expand the ~ character to the full path to your home directory (e.g. /Users/yourname), and copy the whole thing onto your clipboard using the pbcopy command. Now you can paste it into the "Wrapper Command" box.

That's it! You should be able to launch the instance and run with native performance.

1.17

If you usually play on 1.16 and below, then for each 1.17 and above instance just override the global JVM and select the one that says "zulu-16".

Otherwise just set the global JVM to the one that says "zulu-16" and override each 1.16 and below instance's jvm to the one that says "zulu-8".

Support, etc

The files lwjglfat.jar and all libraries in the lwjglnatives folder were compiled by Tanmay from the source available at https://www.lwjgl.org/source and are subject to its BSD-style license terms.

The mcwrap.py script was written by Yusef Napora, and is public domain. Please feel free to fork and improve, but expect PRs & issues, etc to be routed to the Sirius Cybernetics Corporation, Complaints Division. Share and Enjoy!