The steps are very similar on Mac and Linux. Launch Minecraft, connect to your son's LAN game as usual From within Notepad, browse to C:\Windows\System32\drivers\etc\, set the file filter to 'All files', and open the file called hosts (it has no file extension)Īdd a line with the following text: 0.0.0.0.The 'original' displayName trick: open C:\Users\\AppData\Roaming\.minecraft\launcher_profiles.json in a text editor, search for 'displayName' and replace the value next to it by someting else (eg 'Dad').For me (Windows 10), these were the steps: Keep the wifi/lan router on, just don't connect it to the internet.Ī less crude version is to just block access to the Minecraft servers. The crude version of this is to just disconnect your house's internet cable from the modem/router. I found that the solution is to somehow stop Minecraft from accessing the internet. Then, when you connect to the LAN game, it complains that a user with that name already exists. 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.