Hi, this issue is still present in the build 3.9.1. on macOS 10.13.6 (17G7024). First thx to the developpers to keep up with this amazing tool and it's free. So kudos to them :) The issue is in the script squirrel-sql.sh located in /Applications/SQuirreLSQL.app/Contents/MacOS that sets the wrong path to 2 jars and the lib directory. To fix the issue find the lines and change the paths to these below: "$JAVACMD" -cp "$UNIX_STYLE_HOME/../Resources/Java/lib/versioncheck.jar" JavaVersionChecker 1.8 9...