I installed Mavericks and now JAVA is broken. after installing Mavericks you must install JAVA from JAVA.com and the most recent Apple JAVA update (Java For OSX 2013-05), which I did. In Java Control Panel > Security, the Security Level "slider" is grayed-out (can't change it, it's set at 'High') and the 'Enable Java content in browser' check-box will not retain a check-mark. So I can't change either of these two settings. This happens as a 'Standard User' with Authentication or logged-in as an 'Administrator. Cannot get JAVA apps to work. I've uninstalled JAVA, reinstalled JAVA, repaired permissions, restarted, etc. There are other similar posts on the apple and java forums. output from Terminal: Last login: Sun Oct 27 09:28:12 on console Peters-MacBook-Pro-2:~ prock$ java -version java version "1.6.0_65" Java(TM) SE Runtime Environment (build 1.6.0_65-b14-462-11M4609) Java HotSpot(TM) 64-Bit Server VM (build 20.65-b04-462, mixed mode) any suggestions?