You can check which Java version is on your Mac to see if you have the most up-to-date Java running, or you can check on the Java website.

Which version of Java should you use in Linux? Learn how to easily switch between different versions with a tutorial from Jack Wallen.

Java used to be deeply embedded in OS X, but in recent versions of the OS it's an optional install. Here is how to check to see if it is installed, and how to disable or remove it.

Step 2: Make sure you have Java Version 7 Update 11. In the Java Control Panel, under About, click the About button. The About Java dialog shows you the version number; if you’ve patched Java in ...