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This isn't trivial as it requires forcing a _JAVA_Choice override at launch (or system large).DiagnoseTo diagnose this because the cause, first launch Minecraft from terminal with the _JAVA_Options overridden.1. Close Minecraft2. Open ???? Highlight (???? in higher proper of Desktop)3. Seek for "Terminal", open the appPaste the following command in:_JAVA_Options=-Djava.net.preferIPv4Stack=true /Functions/Minecraft.app/Contents/MacOS/launcherAttempt to hook up with LAN server and see if it fixes the issueCompletely FixUsing Minecraft Launch Options: @TheOnlyMrCat supplies a technique right here that does not contain modifying any files by hand. Please strive that earlier than making changes to the Minecraft launcher.Patching the launcher manually:Use this methodology solely when you have issues utilizing @TheOnlyMrCat's resolution.This _JAVA_Options override might be provided in many locations but since launching from Terminal shouldn't be splendid, we need to use a technique that fixes when clicking on the icon. strongcraft At time of posting, the Apple recommended methodology for providing overrides is inside the App bundle itself using one thing known as LSEnvironment1. Optionally set up a Textual content Editor corresponding to Atom to edit XML files.2. Utilizing Finder, go to Purposes3. Find (don't open) the Minecraft App4. Right click on Minecraft, Show Package Contents5. Go into the Contents folder and find Data.plist6. Right click on Information.plist, Open With, Atom (or TextEditor)Close to the bottom of the file, add the next in between the LSEnvironment _JAVA_Options -Djava.net.preferIPv4Stack=trueSadly this does not take impact instantly. This is due to the way Mac caches it's launch services.