UltimMC is a custom launcher for Minecraft which allows you to manage multiple instances and use offline ("cracked") accounts while keeping as close as possible to the original.

Important

This project is a fork of MultiMC.

This software is provided without any warranty, so please don't contact the main MultiMC developers in case anything goes wrong using this launcher.

Nonetheless, feel free to create an issue within this repository in case you face an issue specific to UltimMC.

Downloading

• All the available downloads can be found here. These builds are directly taken from our GitHub Actions.

Direct downloads for specific platforms can be found below.

• Windows (32-bit and 64-bit).

• Linux (64-bit).

• macOS (10.14 and newer).

Note

In the case you're using macOS then another additional step you might need to do is to make UltimMC an executable by running the command chmod +x UltimMC.app/Contents/MacOS/UltimMC in the terminal.

There's additionally a .deb package for Debian/Ubuntu distributions.

And an AUR package as ultimmc-bin.

Installing and Using

1. Pick the correct download for your system.
2. Uncompress it in your desired directory.
3. Launch UltimMC.
4. Go to account settings.
5. A. Pick "Add Local" and you will be requested to use the username you desire, this can be anything.
6. B. Pick "Add Ely.by" and add your Ely.by account by putting your email and password.
7. Save it.
8. Now enjoy the Launcher.

Updating

To update the launcher replace all replaceable files and folders with the newer ones from any of the links listed above.

A better update system is in the works.

Forking

This project now includes our MSA API key in order to have functional Microsoft authentication within the launcher.

This means you're accepting the:

• Microsoft Identity Platform Terms of Use

We humbly ask that in case you wish to fork UltimMC, please either remove the key by setting it empty ("") or by setting your own.