UltimMC

6.8easy start · #56of 74
in Minecraft Launchers

Runs on Linux, Mac, Windows.

UltimMC is ranked #56 of 74 in Minecraft launchers on The Geeks Club. It runs on Linux, macOS, Windows. There is a free plan.

UltimMC plans and pricing

UltimMC Free No paid plans or usage limits stated github.com · 12 Oct 2026

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Purpose: UltimMC is a custom Minecraft launcher for managing multiple instances and using offline accounts while keeping as close as possible to the original.
Project origin: The project is a fork of MultiMC.
Windows support: Direct downloads are available for 32-bit and 64-bit Windows.
Linux support: A 64-bit Linux download is available, along with a .deb package for Debian and Ubuntu and an AUR package.
macOS support: A macOS download is available for macOS 10.14 and newer.
Build source: The project says its available builds are taken directly from its GitHub Actions.
Account options: The setup instructions describe adding a local account with a chosen username or adding an Ely.by account using an email and password.
Microsoft authentication: The project says it includes an MSA API key for Microsoft authentication and asks forks to remove the key or set their own.
Update process: Updating currently involves replacing replaceable files and folders with newer downloads; the project says a better update system is in the works.
Warranty: The software is provided without any warranty.
Support: Users can create a repository issue for problems specific to UltimMC; the README says not to contact the main MultiMC developers about problems with this launcher.
Organization: The UltimMC GitHub organization describes itself as dedicated to developing UltimMC and related software.
Price from: Free

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