It would be so much better if they just fixed the underlying problem with the IDE so that it can work with the latest JRE and JDK. Java 1.6 is so old now that it must be embarrassing for Microchip to have to keep asking people to re-install this. If you have more than one JVM installed on your machine, you can locate each of them by executing these commands: /usr/libexec/java_home -v 1.6 In that case, see above to install Java 6.

If Java is not installed, it will open a window with a message about Java missing. How to check your computer's Java versionIf you're not sure what version of Java is installed on your computer, open a Terminal (Applications -> Utilities -> Terminal.app) and type this at the shell prompt: java -version This will report which default version you have installed on your computer. The MPLAB X IDE installer will find and use Java 6 once it is installed. The default JVM used to run applications will continue to be Java 7 after the update is applied. Java 6 and 7 should be able to coexist on your machine.

The download button for Java 6 is in the upper right corner of the page. If you have encountered a Java 6 issue during the MPLAB X installation, please follow these instructions if this applies to you: Your computer doesn't have Java installed or has Java 7 installed, but not Java 6.In this case, you need to download the update for Java 6 from Apple by visiting this Apple Knowledge Base article. If you have Mac OS X Lion, Mountain Lion or Mavericks (version 10.7, 10.8, or 10.9 respectively) or anything newer, you need Java 6 to run MPLAB X IDE. MPLAB X v2.XX: MacOSX 10.7 and above require JRE6

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