anonminer122

I originally looked for that Java folder under users instead of system and was able to locate it and delete it. The server is up and running now thanks to your help! Thank you so much Cadiboo and DaemonUmbra! ?

That folder doesn't exist on my computer, yet /usr/libexec/java_home in terminal will show "/Library/Java/JavaVirtualMachines/jdk-12.0.1.jdk/Contents/Home". Finder > Go can't find those folders either. Make of that what you will. I think at this point I might be better off just reinstalling Mojave, since this clearly is an issue with either Java or macOS and not Forge. ? I appreciate your help.

That did result in Java build 12. I don't know why it's version 12, as I haven't installed that version. I did install version 11, but used the terminal commands here to uninstall Java. Perhaps it's the built-in version in Mojave? I'll need to look into it more tomorrow. Any suggestions are welcome. Thank you for helping me diagnose this.

Also, I am able to launch minecraft_server.1.12.2.jar using the same start.command targeting that file, but not the Forge server.

As I stated in the post, I have installed both the JRE and JDK of Java 8.

I am attempting to launch forge-1.12.2-14.23.5.2779-universal.jar from start.command on Mac, but receive the error below. I have installed both JRE 8u211 and JDK 8u211. Also note, I can launch the server normally when I don't use start.command, which I'm doing so that I can allocate more RAM. The start.command text reads: #!/bin/bash cd "$(dirname "$0" )" java -Xmx6G -Xms2G -jar forge-1.12.2-14.23.5.2779-universal.jar The error message is: ~/Library/Application\ Support/minecraft/start.command ; exit; A problem occurred running the Server launcher.java.lang.reflect.InvocationTargetException at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.base/java.lang.reflect.Method.invoke(Method.java:567) at net.minecraftforge.fml.relauncher.ServerLaunchWrapper.run(ServerLaunchWrapper.java:70) at net.minecraftforge.fml.relauncher.ServerLaunchWrapper.main(ServerLaunchWrapper.java:34) Caused by: java.lang.ClassCastException: class jdk.internal.loader.ClassLoaders$AppClassLoader cannot be cast to class java.net.URLClassLoader (jdk.internal.loader.ClassLoaders$AppClassLoader and java.net.URLClassLoader are in module java.base of loader 'bootstrap') at net.minecraft.launchwrapper.Launch.<init>(Launch.java:34) at net.minecraft.launchwrapper.Launch.main(Launch.java:28) ... 6 more logout Saving session... ...copying shared history... ...saving history...truncating history files... ...completed. [Process completed]