MorphoJ does not run with Mac OS X El Capitan. What to do?
According to the official website, the software is compatible with OSX 10.5 and higher, which means there is a possibility this software will work on El Capitan. Since the installation package is in JAR file, you will need Java Runtime Environment in order to launch it.
Download Java and then download the JAR file and then you can try to install it.