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Minecraft Forge will not install on MacOS, says The Java JAR file could not be launched

jackphillipn
in Support & Bug Reports

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Posted

I have downloaded (forge-1.12.2-14.23.5.2768-universal.jar) which is the latest version and I have the most recent update of Java installed (jre-8u251-macosx-x64.dmg) directly from their website. I have researched this extensively and would really appreciate some help. When I try to open the forge installer with Jar Launcher my system seems to show me a message that says "The Java JAR file "forge-1.12.2-14.23.5.2768-universal.jar" could not be launched. Check the console for possible error messages. I'm very new to this so please bear with me, this all I've found in the console:

 

assessment denied for forge-1.12.2-14.23.5.2768-universal.jar

com.apple.message.domain: com.apple.security.assessment.outcome2

com.apple.message.signature2: bundle:UNBUNDLED

com.apple.message.signature4: 3

com.apple.message.signature3: forge-1.12.2-14.23.5.2768-universal.jar

com.apple.message.signature5: UNKNOWN

com.apple.message.signature: denied:no usable signature

SenderMachUUID: 58DD8703-DA55-3642-BD3E-F73AB302F3EA

Quote

When I try to open the forge installer with ... "The Java JAR file "forge-1.12.2-14.23.5.2768-universal.jar"


1.12 is no longer supported on this forum.

Please update to a modern version of Minecraft to receive support.

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https://forums.minecraftforge.net/topic/84421-minecraft-forge-will-not-install-on-macos-says-the-java-jar-file%C2%A0could-not-be-launched/
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