Selecting JDK 1.7.0_07 odin:~ geff$ /usr/libexec/java_home -v 1.7.0_07 -exec java -version Java HotSpot(TM) 64-Bit Server VM (build 23.0-b21, mixed mode) Java(TM) SE Runtime Environment (build 1.7.0_04-b21) Selecting the first Oracle JDK 1.7.0_04 odin:~ geff$ /usr/libexec/java_home -v 1.7.0_04 -exec java -version Java HotSpot(TM) 64-Bit Server VM (build 20.12-b01-434, mixed mode) This works for me also to use the Apple supplied 1.6 JDK odin:~ geff$ /usr/libexec/java_home -v 1.6.0_37 -exec java -version Here is an illustration and examples from my setup:

usr/libexec/java_home -v 1.7.0_06 -exec javac -version To run a different version of Java, either specify the full path, or use the java_home tool: This is of course rather involved and will get broken every time wuala autoupdates but otherwise it works. I.e simply replacing: exec with: /usr/libexec/java_home -v 1.6.0 -exec Where I needed to run Wuala using Java 1.6 whilst I needed to develop with JDK 1.7 and I managed this by opening the Wuala.app package and changing its startup script in: /Applications/Wuala.app/Contents/MacOS/wualaįrom: exec java $' -installed $* I had a similar problem like you have with Minecraft with Wuala.

The JRE version used by the system can be determined I don't think it's possible to switch JRE (runtime environments) see here:

Java 6 mac os 10.8