Tethys

I tried that. Multiple times. I run the installer .jar file, and I get the same error The Java JAR file "forge-1.8.9-11.15.1.1722-universal.jar" could not be launched. Check the console for possible error messages. If you know of anything else, the help would be appreciated.

Hey! First of all, I don't know if I'm allowed to do this according to the E.A.Q., but I haven't seen a fix for this issue, and I want to play. (reasoning 100) I have previously installed a multitude of FML versions, from 1.8.9, 1.10.2, 1.11.0, 1.11.2., and 1.12.2. I installed all of these before moving to OS X High Sierra, and I believe I was on OS X Mountian Lion. (apple make these names shorter) I wanted to play a simplified version of my 1.8.9 mods, so I went through my mods folder and removed about half of the ones that I don't need. I then search "forge 1.8.9", first link, universal, while downloading launch vanilla 1.8.9, download done, drag file to the desktop, double click. I got the stupid "uhh hey man this file is from an unknown developer. if you wan open the 100% virus malware file, go to system preferences > security and privacy, and open it from there". So I do that, double click on the icon again, and I get this error. The Java JAR file "forge-1.8.9-11.15.1.1722-universal.jar" could not be launched. Check the console for possible error messages. Okay. (cmon man i just want to play minecraft) I check the console, and I think this is the error messages, but I could be completely wrong. I am not versed in the code lingo. Mar 8 21:26:14 Gregory-Kastens-Mac-mini launcher[3148]: Claimed it found a path: /Applications/Minecraft.app/Contents/MacOS/launcher (/Applications/Minecraft.app/Contents/MacOS/launcher) 4096 Mar 8 21:26:14 Gregory-Kastens-Mac-mini com.apple.xpc.launchd[1] (com.apple.preference.displays.MirrorDisplays): Service only ran for 0 seconds. Pushing respawn out by 10 seconds. Mar 8 21:26:14 Gregory-Kastens-Mac-mini systemstats[63]: assertion failed: 17G65: systemstats + 914800 [D1E75C38-62CE-3D77-9ED3-5F6D38EF0676]: 0x40 Mar 8 21:26:16 Gregory-Kastens-Mac-mini launcher[3148]: [0308/212616:ERROR:LocalVersionProvider.cpp(145)] Found an unexpected file .DS_Store Mar 8 21:26:16 Gregory-Kastens-Mac-mini launcher[3148]: [0308/212616:ERROR:LocalVersionProvider.cpp(140)] Version OptiFine_1.3.1_HD_U_A1 doesn't have a json file. Mar 8 21:26:16 Gregory-Kastens-Mac-mini launcher[3148]: [0308/212616:ERROR:LocalVersionProvider.cpp(140)] Version doesn't have a json file. Mar 8 21:26:24 Gregory-Kastens-Mac-mini com.apple.xpc.launchd[1] (com.apple.preference.displays.MirrorDisplays): Service only ran for 0 seconds. Pushing respawn out by 10 seconds. I did do a little bit of research beforehand, and I found a guide that should help you geniuses out. Last login: Fri Mar 8 20:56:46 on ttys001 Gregory-Kastens-Mac-mini:~ Greg$ java -version java version "1.8.0_131" Java(TM) SE Runtime Environment (build 1.8.0_131-b11) Java HotSpot(TM) 64-Bit Server VM (build 25.131-b11, mixed mode) Gregory-Kastens-Mac-mini:~ Greg$ java -jar /Users/Greg/Desktop/forge-1.8.9-11.15.1.1722-universal.jar We appear to be missing one or more essential library files. You will need to add them to your server before FML and Forge will run successfully.java.lang.ClassNotFoundException: net.minecraft.launchwrapper.Launch at java.net.URLClassLoader.findClass(URLClassLoader.java:381) at java.lang.ClassLoader.loadClass(ClassLoader.java:424) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:335) at java.lang.ClassLoader.loadClass(ClassLoader.java:357) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:348) at net.minecraftforge.fml.relauncher.ServerLaunchWrapper.run(ServerLaunchWrapper.java:25) at net.minecraftforge.fml.relauncher.ServerLaunchWrapper.main(ServerLaunchWrapper.java:12) This is all of the information I can give you right now, and any help would be much appreciated. Thanks for reading, and have a good day!