Arqade Asked on July 11, 2021
I’ve been playing Minecraft with my son for a couple of years now, while using the same account on a LAN without any problem, until the past couple of weeks. I have a Mac and a Windows 10 machine, both running the latest stable releases. I used a common ‘hack’ to allow the same account to connect to each other by editing the launcher_profile.json file on the Mac, and changing the username and DisplayName variables to something else (in this case, ‘Dad’).
This hack is no longer working, and I can’t find anything recent that confirms any changes to hack.
How can I get LAN gaming working again without purchasing another Minecraft account?
(I’m not interested in using it for online multiplayer).
The issue is that Minecraft contacts their servers when you start up, and overwrites the displayName with whatever is linked to the actual account on their servers. Then, when you connect to the LAN game, it complains that a user with that name already exists.
I found that the solution is to somehow stop Minecraft from accessing the internet. Do the displayName trick, game on.
The crude version of this is to just disconnect your house's internet cable from the modem/router. Keep the wifi/lan router on, just don't connect it to the internet.
A less crude version is to just block access to the Minecraft servers. For me (Windows 10), these were the steps:
C:Users<username>AppDataRoaming.minecraftlauncher_profiles.json in a text editor, search for "displayName" and replace the value next to it by someting else (eg "Dad").C:WindowsSystem32driversetc, set the file filter to "All files", and open the file called hosts (it has no file extension)Add a line with the following text:
0.0.0.0 minecraft.net
Launch Minecraft, connect to your son's LAN game as usual
The steps are very similar on Mac and Linux.
Step 1 is described in more detail here: Is it still possible to set your username in offline mode in Minecraft 1.6 and later?
Steps 2-4 are described in more detail here: https://www.howtogeek.com/howto/27350/beginner-geek-how-to-edit-your-hosts-file/
This way, you don't need to kick the rest of the family off Netflix :-)
There's still a downside: minecraft.net will be blocked for all your applications. You won't be able to download minecraft updates or even visit the site. Acceptable to me, although I still think Minecraft should have some sort of "father and son" mode - IMO it's ridiculous that I need to pay for two licenses just to be able to help a six year old build a roof every two months. That can't have been the idea behind Minecraft's licensing setup.
Correct answer by skrebbel on July 11, 2021
Try to change online-mode=true - replace true with false in the server startup config.
You also need to change DisplayName on one of the client instance.
This helps me with the same issues.
Answered by Yaroslav Rutsky on July 11, 2021
Open the following file with notepad:
C:Users<username>AppDataRoaming.minecraftlauncher_profiles.json
change the line with the display name so that all clients on LAN have different display names.
finally, save the file, right click, select properties, enable Read only, click ok.
Start game as normal.
Answered by user232969 on July 11, 2021
Besides editing the variable displayName in %appdata%.minecraftlauncher_profiles.json to a different name, I found that you need to end the process Minecraft Launcher first before launching it again, otherwise the old variable is overwritten back. You should see the new name in the launcher.
Answered by user1000 on July 11, 2021
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