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Minecraft>Mods>MixinBooter
MixinBooter logo

MixinBooter

By👤CleanroomMC

The Mixin Library for 1.8 - 1.12.2.

Why MixinBooter is a top-tier mod mod for Minecraft 1.12.2

The Mixin Library for 1.8 - 1.12.2.

⚙️ Quick Resource Specs

Mod CreatorCleanroomMC
Latest Version1.12.2
Supported Game Versions1.12.2, 1.12.1, 1.12, 1.11.2, 1.11.1
File Size2.35 MB
Last UpdatedUpdated: August 21, 2026
Total Downloads12,135,567 downloads
Looking for the best mods updates? MixinBooter by CleanroomMC provides excellent features tailored for Minecraft 1.12.2 players. It stands out in the mods category for its stability and beautiful execution.

MixinBooter

Allows any mixins that work on mods to work effortlessly on 1.8 - 1.12.2

  • Current Mixin Version: CleanMix 0.2.9 by CleanroomMC, a fork of SpongePowered/Fabric Mixin (0.8.7)

  • Current MixinExtra Version: 0.5.4

Pseudo-Changelog:

  • As of 4.2, MixinBooter's API has changed and all mods that uses mixins are encouraged to depend on MixinBooter, even those that mixin into vanilla/forge/library classes. To avoid mixin version mismatches with mods crashing trying to implement modded mixins (looking at you VanillaFix). Thanks to @embeddedt recommending and helping me introduce this change!

  • As of 5.0, MixinExtras by @LlamaLad7 is shaded. Available for developers to use.

  • As of 8.0, MixinBooter will now work from 1.8 - 1.12.2. One single build works with all these versions! (TODO: LiteLoader support?)

  • As of 8.4, MixinBooter actively attempts to be compatible with SpongeForge

  • As of 9.2, MixinBooter reinstates the older MixinLoader annotation for 1.8.x usages.

  • As of 10.0, MixinBooter follows Mixin 0.8.7

  • As of 11.0, MixinBooter is built on CleanMix. As an effort to create an unified backend with Cleanroom.

    • No longer would you need to declare dependencies for the annotation processor yourself.
    • Also adds a config file (config/mixinbooter.cfg) to blacklist mixin configs and toggle debug options
    • Dedicated logs/mixinbooter.log mixin log. With ability to trace class-loading for precise debugging.
    • Allows traditional MixinConfig + MixinConnector manifest attribute entries to be fully involved in the ecosystem
    • Mod discovery for mixin owners, better isModLoaded checks
    • Suppresses Forge's corrupt zip warnings
    • Phased out mixin "phases"

For Developers ~ Getting Started:

  1. Add CleanroomMC's repository and depend on MixinBooter's maven entry:
repositories {
    maven {
        url 'https://maven.cleanroommc.com'
    }
}

dependencies {
    def mixin = 'zone.rong:mixinbooter:11.0'

    implementation (mixin) {
        transitive = false
    }
    annotationProcessor mixin

    // RetroFuturaGradle for refmap generation:
    modUtils.enableMixins(mixin)
    // modUtils.enableMixins(mixin, 'mod_id.mixins.refmap.json') << add refmap name as 2nd arg (optional)
}
  1. Pick how to register your mixin configurations. MixinBooter supports lots of approaches:

(As of 11.0, early/late divide is no longer present, therefore IEarly/ILateMixinLoaders are deprecated)

  • MixinConfigs manifest attribute: no loader class needed. Add a space-separated list of your mixin configuration names to your jar's manifest. MixinBooter reads it straight from the jar's manifest and registers them.
  • MixinConnector manifest attribute: register configs programmatically. Point it at a class implementing org.spongepowered.asm.mixin.connect.IMixinConnector, its connect() is called during boot, where you call Mixins.addConfiguration(...) yourself.

Both manifest attributes are set on your jar task:

jar {
    manifest {
        attributes(
                'MixinConfigs': 'mixins.mymod.json',
                'MixinConnector': 'com.example.mymod.MyMixinConnector'
        )
    }
}
public class MyMixinConnector implements IMixinConnector {

    @Override
    public void connect() {
        // Check if mod is loaded before registering?
        // Possible with zone.rong.mixinbooter.service.ModDiscoverer.isModPresent(String modId)
        Mixins.addConfiguration("mixins.mymod.json");
    }

}

The Ultimate Guide to MixinBooter

If you are exploring the vast world of Minecraft modifications, MixinBooter by CleanroomMC is a standout mod that deserves your attention. With over 12,135,567 downloads, it has become a staple for players looking to enhance their experience. As the creator describes it, this project is "The Mixin Library for 1.8 - 1.12.2.". Whether you are a veteran builder constructing massive cities, or simply a casual player looking to upgrade your survival world, this guide will provide you with all the essential details on how MixinBooter alters the game.

What Makes It Special?

Unlike standard mods that simply alter superficial elements, MixinBooter introduces a wide array of visual and mechanical features designed to seamlessly blend into the vanilla aesthetic. CleanroomMC has clearly spent significant time refining the project to ensure that every aspect feels polished and responsive for version 1.12.2.

Installation Guide

Getting MixinBooter up and running is straightforward. Follow these step-by-step instructions:

  1. Verify Your Version: Ensure your Minecraft launcher is set to version 1.12.2.
  2. Install Mod Loader (if required): If this is a mod, download the compatible loader (Forge, Fabric, NeoForge).
  3. Download the File: Click the secure download button above to retrieve the official file from CurseForge.
  4. Move the File: Place the downloaded file into your `mods`, `shaderpacks`, or `resourcepacks` folder depending on the mod type.
  5. Launch and Enjoy: Open Minecraft, navigate to the respective settings menu, and activate MixinBooter.

Compatibility & Performance

Compatibility is robust. MixinBooter is designed specifically for version 1.12.2, taking full advantage of the latest engine optimizations. During typical gameplay, this addition maintains a stable frame rate, though lower-end laptops might experience slight stuttering. We recommend pairing this with performance boosters like Sodium or Iris to guarantee a silky-smooth experience.

Details

Downloads:12,135,567
Created:5 years ago
Updated:5 days ago
Project ID:419286
License:All Rights Reserved
Environment:Server

Game Versions

1.12.21.12.11.121.11.21.11.11.11

Mod Loaders

Forge

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MixinBooter

Screenshot 0
C
CleanroomMC
MODS CREATOR
Downloads12.1M
Version1.12.2
TypeMODS
File Size2.35 MB

About This mods

The Mixin Library for 1.8 - 1.12.2.

MixinBooter

Allows any mixins that work on mods to work effortlessly on 1.8 - 1.12.2

  • Current Mixin Version: CleanMix 0.2.9 by CleanroomMC, a fork of SpongePowered/Fabric Mixin (0.8.7)

  • Current MixinExtra Version: 0.5.4

Pseudo-Changelog:

  • As of 4.2, MixinBooter's API has changed and all mods that uses mixins are encouraged to depend on MixinBooter, even those that mixin into vanilla/forge/library classes. To avoid mixin version mismatches with mods crashing trying to implement modded mixins (looking at you VanillaFix). Thanks to @embeddedt recommending and helping me introduce this change!

  • As of 5.0, MixinExtras by @LlamaLad7 is shaded. Available for developers to use.

  • As of 8.0, MixinBooter will now work from 1.8 - 1.12.2. One single build works with all these versions! (TODO: LiteLoader support?)

  • As of 8.4, MixinBooter actively attempts to be compatible with SpongeForge

  • As of 9.2, MixinBooter reinstates the older MixinLoader annotation for 1.8.x usages.

  • As of 10.0, MixinBooter follows Mixin 0.8.7

  • As of 11.0, MixinBooter is built on CleanMix. As an effort to create an unified backend with Cleanroom.

    • No longer would you need to declare dependencies for the annotation processor yourself.
    • Also adds a config file (config/mixinbooter.cfg) to blacklist mixin configs and toggle debug options
    • Dedicated logs/mixinbooter.log mixin log. With ability to trace class-loading for precise debugging.
    • Allows traditional MixinConfig + MixinConnector manifest attribute entries to be fully involved in the ecosystem
    • Mod discovery for mixin owners, better isModLoaded checks
    • Suppresses Forge's corrupt zip warnings
    • Phased out mixin "phases"

For Developers ~ Getting Started:

  1. Add CleanroomMC's repository and depend on MixinBooter's maven entry:
repositories {
    maven {
        url 'https://maven.cleanroommc.com'
    }
}

dependencies {
    def mixin = 'zone.rong:mixinbooter:11.0'

    implementation (mixin) {
        transitive = false
    }
    annotationProcessor mixin

    // RetroFuturaGradle for refmap generation:
    modUtils.enableMixins(mixin)
    // modUtils.enableMixins(mixin, 'mod_id.mixins.refmap.json') << add refmap name as 2nd arg (optional)
}
  1. Pick how to register your mixin configurations. MixinBooter supports lots of approaches:

(As of 11.0, early/late divide is no longer present, therefore IEarly/ILateMixinLoaders are deprecated)

  • MixinConfigs manifest attribute: no loader class needed. Add a space-separated list of your mixin configuration names to your jar's manifest. MixinBooter reads it straight from the jar's manifest and registers them.
  • MixinConnector manifest attribute: register configs programmatically. Point it at a class implementing org.spongepowered.asm.mixin.connect.IMixinConnector, its connect() is called during boot, where you call Mixins.addConfiguration(...) yourself.

Both manifest attributes are set on your jar task:

jar {
    manifest {
        attributes(
                'MixinConfigs': 'mixins.mymod.json',
                'MixinConnector': 'com.example.mymod.MyMixinConnector'
        )
    }
}
public class MyMixinConnector implements IMixinConnector {

    @Override
    public void connect() {
        // Check if mod is loaded before registering?
        // Possible with zone.rong.mixinbooter.service.ModDiscoverer.isModPresent(String modId)
        Mixins.addConfiguration("mixins.mymod.json");
    }

}
📌Supported Minecraft Versions: 1.12.2, 1.12.1, 1.12, 1.11.2, 1.11.1, 1.11

How to Install

1. Make sure Minecraft Fabric or Forge launcher is installed. 2. Place the downloaded .jar or .mcpack file into your Minecraft mods folder. 3. Launch Minecraft and enjoy!