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Release Major update Java 21

Minecraft 1.21.11 Mounts of Mayhem

Type Release
Release date
Platform Windows, macOS, Linux
Publisher Mojang Studios
Required Java Java 21

About Minecraft 1.21.11

Minecraft Java Edition 1.21.11 is an official release of the game from Mojang Studios. This version includes new features, bug fixes and gameplay improvements. Minecraft Java Edition is available for Windows, macOS and Linux.

Minecraft 1.21.11 system requirements

Minecraft 1.21.11 needs Java 21 and modern hardware with OpenGL 4.4 support. Here are the minimum system requirements:

Java Java 21
Memory (RAM) 4 GB (8 GB recommended)
Processor Intel Core i5-4690 / AMD Ryzen 5 1600 or better
Graphics card Nvidia GeForce GTX 960 / AMD Radeon RX 560 with OpenGL 4.4 support
Free disk space ~1 GB (without mods or shaders)
Operating system Windows 10 (64-bit)+, macOS 10.14.5+, Linux (64-bit)

Since version 1.20.5, Minecraft requires Java 21 or newer. The official Minecraft Launcher comes with its own built-in Java, so you don't need to install it separately. If you use a third-party launcher or run a server, make sure you have the right JDK installed.

How to download and install Minecraft 1.21.11

Minecraft 1.21.11 (Mounts of Mayhem) is free for everyone who owns the game. You get it automatically through the official Minecraft Launcher. Here's a detailed step-by-step guide:

  1. Make a backup: before every update, we recommend copying the .minecraft/saves folder somewhere safe. That way you won't lose your worlds if something goes wrong.
  2. Open the Minecraft Launcher: start the official launcher. If you don't have it installed, download it from minecraft.net.
  3. Go to the "Installations" tab: click "Installations" in the top menu, then "New installation".
  4. Choose version 1.21.11: pick 1.21.11 from the version drop-down list. You can also set your own installation name and game directory.
  5. Create the installation and start the game: after saving, go back to the launcher's main screen, select the new installation from the list and click "Play".

Server file

If you run a multiplayer server, remember to download the matching server.jar file for version 1.21.11. Server files are available on the official Mojang Studios website in the "Server Software" section. After downloading, replace the old server file with the new one and restart the server. We also recommend backing up the server world before you update.

Related versions in the 1.21 cycle

Here are the other versions from the same release cycle:

1.21.10 1.21.9 The Copper Age 1.21.8 1.21.7 1.21.6 Chase the Skies 1.21.5 Spring to Life 1.21.4 The Garden Awakens 1.21.3 Bundles of Bravery (hotfix) 1.21.2 Bundles of Bravery 1.21.1 Tricky Trials (hotfix) 1.21 Tricky Trials

See the main release page:  Minecraft 1.21 - Tricky Trials

Frequently asked questions about Minecraft 1.21.11

Is Minecraft 1.21.11 a stable version?

Yes, Minecraft 1.21.11 is an official, stable release of the game from Mojang Studios. It was released on December 9, 2025. You can safely play it on multiplayer servers and in single-player worlds.

Do mods work on Minecraft 1.21.11?

Most mods have to be updated for a new version of the game. After a release like 1.21.11, mod developers usually need anywhere from a few days to a few weeks to update their mods. Fabric often supports new versions within a day or two, while Forge may take a little longer. Before you update, check on CurseForge or Modrinth whether your favorite mods are compatible.