Running ProGuard on OS X: Where is Apple's equivalent to the rt.jar?

Question

I\'m running ProGuard to shrink my jar file. One of the parameters it needs is the system\'s runtime jar. This is at $JAVA_HOME/lib/rt.jar on Sun distributions,

Answer 1

For me the reason was I had JDK 13 installed. After installing JDK 1.8 the file appeared in the location expected by ProGuard. You can run sudo find /Library -name rt.jar to find the exact path to the rt.jar after installing JDK 1.8