I installed this app that needed Oracle Java 7, so I installed that as well. Turns out the app don't work, so I deleted it. Wanted to do the same for Oracle Java 7, but this turns out to be difficult. Followed these directions: Uninstalling Oracle Java only involves deleting the Java Plugin file JavaAppletPlugin.plugin. Note: To uninstall Java 7, you must have Administrator privileges. Click on the Finder icon located in your dock Click on Applications tab on the sidebar In the Search box enter JavaAppletPlugin.plugin This will find the JavaAppletPlugin.plugin file Right click on JavaAppletPlugin.plugin and select Move to Trash So you'd say it's gone. System preferences keeps showing this 'preference panel' (note: literal translation) icon. Can I completely uninstall it?