Offline MultiMC Instructions

Prerequisites:

• MultiMC
• a UUID and username from https://namemc.com/username

Replace /home/user/.local/share/multimc/accounts.json with this

{
    "accounts": [
        {
            "accessToken": "PLEASE.IGNORE.THIS.TOKEN.TESTING.MOD.STUFF",
            "activeProfile": "47f78584c76c419192fd8c943af13054",
            "clientToken": "PLEASE.IGNORE.THIS.TOKEN.TESTING.MOD.STUFF",
            "profiles": [
                {
                    "id": "47f78584c76c419192fd8c943af13054",
                    "legacy": false,
                    "name": "Fji"
                }
            ],
            "user": {
                "id": "aa1ef1a0330b349ddc187da1237e49cf"
            },
            "username": "[email protected]"
        }

    ],
    "activeAccount": "[email protected]",
    "formatVersion": 2
}

Replace 47f78584c76c419192fd8c943af13054 with your UUID and Fji with your username

Now once saved, open MultiMC and hit "Launch Offline" and then hit ok, and Minecraft will launch logged into this account. Keep in mind, Multi Player won't work.