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PolyMC
What it is
PolyMC is a free, open source Minecraft launcher for Linux, macOS, and Windows. It manages multiple accounts, mods, worlds, resource packs, shader packs, and separate game instances. Each instance keeps its own folder for settings and related files, helping users maintain independent configurations. The launcher supports Forge, Fabric, LiteLoader, and Quilt, and its built-in catalog lists modpacks from CurseForge, Technic, FTB, FTB Legacy, and Modrinth. Individual mods can also be installed from CurseForge and Modrinth for the selected loader and game version. PolyMC provides Java runtime management, logs, and a way to stop Minecraft after a crash or freeze. Users can customize the instance window and theme. The project describes the launcher as built with Qt technologies and provides help through issues or Discord. PolyMC costs nothing. The current macOS build is Apple Silicon only; Intel Mac users are directed to a legacy universal build.
For and against
For
- Separate folders for each instance
- Supports four mod loaders
- Built-in catalog from multiple sources
- Manages worlds and shader packs
- Free on three desktop platforms
Against
- Java version selection is manual
- Current macOS build requires Apple Silicon
- No paid tiers are stated
The verdict
PolyMC organizes Minecraft instances, loaders, modpacks, and Java in one free launcher. Manual Java selection and the Apple Silicon limitation on the current macOS build may affect setup choices.
Who it suits
PolyMC suits Minecraft players who maintain separate modded setups across desktop operating systems. It is especially useful for users choosing among several loaders and modpack sources.
Plans and prices
PolyMC
Open source Minecraft launcher · no paid tiers stated
Read 11 Oct 2026 · polymc.org
On the record
- Built-in modpack catalog
- Yespolymc.org · read 22 Sep 2026
- Customization
- The home page says users can customize the instance window and theme.polymc.org · read 11 Oct 2026
- Diagnostics
- PolyMC provides access to logs and a way to stop Minecraft if it crashes or freezes.polymc.org · read 11 Oct 2026
- Individual mods
- It can install individual mods from CurseForge and Modrinth, tailored to the selected loader and game version.polymc.org · read 11 Oct 2026
- Instances
- Each Minecraft instance has its own folder for separate mods, resource packs, settings, and other files.polymc.org · read 11 Oct 2026
- Java runtime management
- Yespolymc.org · read 22 Sep 2026
- Java setup
- PolyMC does not yet automatically select the right Java version for an instance, so users must select it manually.polymc.org · read 11 Oct 2026
- License
- The launcher code is available under GPL-3 and the logo and related assets use CC BY-SA 4.0.polymc.org · read 11 Oct 2026
- Mod loaders
- The launcher supports installing Forge, Fabric, LiteLoader, and Quilt.polymc.org · read 11 Oct 2026
- Mod loader support
- multiplepolymc.org · read 22 Sep 2026
- Modpack import
- bothpolymc.org · read 22 Sep 2026
- Modpacks
- PolyMC lists modpack installation from CurseForge, Technic, FTB, FTB Legacy, and Modrinth.polymc.org · read 11 Oct 2026
- Notable limit
- The current macOS build is Apple Silicon only; the site directs Intel Mac users to the legacy universal build.polymc.org · read 11 Oct 2026
- Performance
- PolyMC is built with Qt technologies, which its site says keeps the launcher performant and light on system resources.polymc.org · read 11 Oct 2026
- Product
- PolyMC is an open source Minecraft launcher for managing multiple instances, accounts, and mods.polymc.org · read 11 Oct 2026
- Separate instances
- Yespolymc.org · read 22 Sep 2026
- Support
- The project directs users to create an issue or ask in its Discord server for help.github.com · read 11 Oct 2026
- Worlds and resources
- The launcher can manage worlds, resource packs, and shader packs.polymc.org · read 11 Oct 2026
