legacy-lwjgl3
by moehreag
legacy-lwjgl3 lets old Minecraft versions run on the LWJGL 3 library instead of LWJGL 2, and the Ornithe loader is required to use it.
What it does
The mod swaps the LWJGL 2 native libraries used by older Minecraft builds for LWJGL 3. Ornithe runs older versions with this library, and the mod depends on Ornithe Standard Libraries, which must be installed alongside it. Only the client needs the mod, since the change affects how the game window and input work on the player's machine.
The mod includes workarounds for bugs on Wayland, a display server used on some desktops, and an IME preedit overlay, which shows text composition from input method editors. Other mods can use a small API package from legacy-lwjgl3 to hook their own text fields into IME input instead of writing separate implementations. Optional settings can be passed through Java system properties or environment variables, and the author lists them in the project documentation.
Builds cover a1.0.4 – 1.12.2 with 112 release versions, and snapshot builds are published as well. The latest Ornithe file targets 1.12.2 and is dated 2026-10-04. Bleeding-edge builds can be taken from the Actions tab of the source repository. The code is licensed under the GNU Lesser General Public License v2.1 only and is open source, and the source and issue tracker are public.
Key features
LWJGL 3 for old versions
Older Minecraft builds run on LWJGL 3 in place of LWJGL 2 through Ornithe.
Wayland workarounds
Fixes and workarounds address known bugs that appear when the game runs under Wayland.
IME preedit overlay
Text being composed through an input method editor is shown in an overlay while the player types.
Text field API
A small API package lets other mods connect their own text fields to IME input.
Optional configuration
Behavior can be adjusted with system properties or environment variables, listed in the documentation.
Compatibility
Latest build for each game version and loader.
1.12.x3 of 3 versions with builds
1.11.x3 of 3 versions with builds
1.10.x3 of 3 versions with builds
1.9.x5 of 5 versions with builds
1.8.x10 of 10 versions with builds
1.7.x9 of 9 versions with builds
1.6.x3 of 3 versions with builds
1.5.x2 of 2 versions with builds
1.4.x5 of 5 versions with builds
1.3.x2 of 2 versions with builds
1.2.x3 of 3 versions with builds
This mod also publishes snapshot builds. Snapshots are not shown in the matrix.
4 older game versions (1.0 – 1.2.2) not shown. All files on Modrinth
Requirements
Dependencies declared by the latest file for each loader.
Required 1
Required by 3 mods
Use cases
Running old versions on Wayland
Players on desktops that use Wayland can run older Minecraft builds with the Wayland workarounds applied.
Typing in other languages
Players who compose text with an input method editor get the preedit overlay in text fields that use the mod's API.
Who it’s for: Players and modders who run older Minecraft versions with Ornithe, especially on Wayland desktops, and mod authors who need IME support in custom text fields.
Questions
Does legacy-lwjgl3 need Ornithe Standard Libraries?
Does a server need legacy-lwjgl3 installed?
Which game versions does legacy-lwjgl3 support?
In the catalog
legacy-lwjgl3 is one of 36,990 Utility mods on ModsFinder. 2,920 mods support Minecraft 1.12.2.
More from moehreag
Similar mods
What the author says
A mod for Ornithe to run old versions of Minecraft with lwjgl3. The mod offers optional configuration options via system properties or environment variables.
Official listing
- Modrinth page
- modrinth.com/mod/moehreag-legacy-lwjgl3
- Owner
- moehreag
- Published
- 2023-12-21
- Updated on Modrinth
- 2026-10-04
- Facts verified
- 2026-10-15