Updating java on mac
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If you do not develop Java applications, then you do not need to worry about this. Note: If you have not yet installed Apple's Java mac OS 2012-006 update, then you are still using a version of Apple Java 6 that includes the plug-in and the Java Preferences application. Every time you start a Java applet or a Java Web Start (JWS) application, the system starts your program and determines in the background (so that performance of your Java application is not affected) if it has checked for a Java update in the last 7 days. I have installed Java for mac OS 2012-006 and Apple Java 6 can no longer be used for applets or Web Start. The Java for mac OS 2012-006 update from Apple uninstalls the Apple-provided Java applet plug-in from all web browsers.
Note that 32-bit browsers, such as Firefox in 32-bit mode, and Chrome, are not supported by the JRE. How do I find out which version of Java is the system default?
When you start a Java application by clicking a JNLP file, or through the browser, it uses the installed JRE. See Determining the JRE Version Installed on mac OS.
When you attempt to start an app that does not meet certain criteria, Gatekeeper will block it.
To override this, you can modify the Gatekeeper's default settings to .
Upon starting the installation process, the installer automatically detects your current java version, either deletes it and does a complete reinstall or just updates your version.