DbVisualizer 9.2.3 is the first version supporting Java 8. From DbVisualizer 9.2.11 Java 8 is the recommended Java version.
Older DbVisualizer versions than 9.2.3 will not work with Java 8.
Java 8 is required from DbVisualizer 10.0.
macOS El Capitan and Java 8
Does DbVisualizer crash if you click a scrollbar? Check the following for a workaround: Mac OS X: El Capitan and Java 8