Add -Ddrools.dialect.java.compiler=JANINO to Java VM options e.g. -ea -Ddrools.dialect.java.compiler=JANINO Add Janino to maven dependencies
Download latest version of XCode Open Terminal Session enter the following: xcode-select –install This will prompt you to install the command line developer tools click install Download the latest gnu compilers from here latest archive of the GNU compilers in terminal …