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PolyMC

polymc.org

Free plan WindowsmacOSLinux
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Spec score 8.4 #17 of 75 in Minecraft Launchers

What it is

PolyMC is a free, open-source Minecraft launcher for Linux, macOS, and Windows. It manages multiple accounts, mods, and separate instances, with each instance keeping its own folder for mods, resource packs, settings, and other files. The launcher supports Forge, Fabric, LiteLoader, and Quilt, plus modpack installation from CurseForge, Technic, FTB, FTB Legacy, and Modrinth. Individual mods can be installed from CurseForge and Modrinth for the selected loader and game version. PolyMC also manages worlds, resource packs, shader packs, and Java runtimes, and provides logs plus a way to stop Minecraft after crashes or freezes. Users can customize the instance window and theme. The project says its Qt-based launcher remains light on system resources. PolyMC is licensed under GPL-3, while its logo and related assets use CC BY-SA 4.0. The current macOS build supports Apple Silicon; Intel users need the legacy universal build.

Spec sheet

Product
PolyMC is an open source Minecraft launcher for managing multiple instances, accounts, and mods.Read 11 Oct 2026 · polymc.org
Free plan
YesRead 22 Sep 2026 · polymc.org
Support
The project directs users to create an issue or ask in its Discord server for help.Read 11 Oct 2026 · github.com
License
The launcher code is available under GPL-3 and the logo and related assets use CC BY-SA 4.0.Read 11 Oct 2026 · polymc.org
Built-in modpack catalog
YesRead 22 Sep 2026 · polymc.org
Customization
The home page says users can customize the instance window and theme.Read 11 Oct 2026 · polymc.org
Diagnostics
PolyMC provides access to logs and a way to stop Minecraft if it crashes or freezes.Read 11 Oct 2026 · polymc.org
Individual mods
It can install individual mods from CurseForge and Modrinth, tailored to the selected loader and game version.Read 11 Oct 2026 · polymc.org
Instances
Each Minecraft instance has its own folder for separate mods, resource packs, settings, and other files.Read 11 Oct 2026 · polymc.org
Java runtime management
YesRead 22 Sep 2026 · polymc.org
Java setup
PolyMC does not yet automatically select the right Java version for an instance, so users must select it manually.Read 11 Oct 2026 · polymc.org
Mod loader support
multipleRead 22 Sep 2026 · polymc.org
Mod loaders
The launcher supports installing Forge, Fabric, LiteLoader, and Quilt.Read 11 Oct 2026 · polymc.org
Modpack import
bothRead 22 Sep 2026 · polymc.org
Modpacks
PolyMC lists modpack installation from CurseForge, Technic, FTB, FTB Legacy, and Modrinth.Read 11 Oct 2026 · polymc.org
Notable limit
The current macOS build is Apple Silicon only; the site directs Intel Mac users to the legacy universal build.Read 11 Oct 2026 · polymc.org
Performance
PolyMC is built with Qt technologies, which its site says keeps the launcher performant and light on system resources.Read 11 Oct 2026 · polymc.org
Separate instances
YesRead 22 Sep 2026 · polymc.org
Worlds and resources
The launcher can manage worlds, resource packs, and shader packs.Read 11 Oct 2026 · polymc.org

Plans and prices

PolyMC Free Open source Minecraft launcher · no paid tiers stated Read 11 Oct 2026 · polymc.org

Every PolyMC plan and price →

Strong points and limits

Strong points

  • Separate folders for each instance
  • Supports four listed mod loaders
  • Built-in catalogs for major modpack sources
  • Manages worlds, resources, and shaders
  • Free and open source

Limits

  • Java version must be selected manually
  • Current macOS build is Apple Silicon only
  • Intel Mac users need the legacy build

Who it suits

PolyMC suits Minecraft players who maintain separate modded setups across desktop operating systems. It is particularly useful for users comfortable selecting Java versions and managing loaders or modpacks.

Verdict

PolyMC provides broad instance, loader, and modpack management at no listed charge. Its main constraints are manual Java selection and the current macOS architecture limitation.

Where Specifiction places it

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