It is now an optional install that you must select. You may want to check out more Mac applications, such as Objective-Basic, RapidSVN or Forms To Go, which might be similar to DrJava.
It is written in Java 1.1 so it runs on Mac OS 9. If you have trouble, create a file named WorldBuilder.bat with contents (just one line): java -jar KarelJRobot.jar. This file is in the distribution zip in a Windows directory. Put it in the same directory as the jar file and double click it to run the world builder.It has been designed to be a great tool that allows beginners to focus on the development process, rather than learning how the application works. DrJava for Mac is a lightweight application that provides an intuitive programming environment, which assists students in creating their own Java applications.
