View source for Minecraft can't find server on local LAN

;Problem:A minecraft server is running on the local network, but the Minecraft client can't find server on the local LAN.

;Cause: on MacOS, Java uses IPv6 by default for service discovery, but the server is only announced over IPv4.

;Solution: Force Java on the client to prefer IPv4.

;Steps to fix:
# Quit Minecraft and open the Minecraft Launcher
# Select the Minecraft "Installations" tab.
# Edit the installation that you are normally playing
# Select "More options"
# At the "JVM arguments" append the text ` -Djava.net.preferIPv4Stack=true`. In my case, the whole line now reads `-Xmx4G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn256M -Djava.net.preferIPv4Stack=true`
# Save and start Minecraft.

{{Category:Bug Reports}}