Check Java on MacOS Xv10.4 (Tiger)

Mac OS X comes preinstalled with Java but you require Mac OS X v10.4 (Tiger) to support Java 1.5.0. Please note unlike Java 1.4 this may not be installed by default and is not part of the automatic Apple Updater, it is available at http://developer.apple.com/java/download, ensure you get the correct release for your Mac (Intel/PPC)

If you have an earlier version of Mac OS X (e.g Jaguar) you wil have to upgrade your operating system before you can use Jaikoz. More information can be found from Apple here

You can check your Java version as follows. Open a Terminal Window and enter.

java -version

This should return something like

Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_06-112)

If the build number is less than 1.5.0 you will need to install a later version of Java. If it returns

-bash: java: comand not found

This means that your paths are not properly set.