![]() ![]() These are required because the Java settings are stored in the "ByHost" preferences folder within each user account, which stores settings on a per-computer basis. ![]() First you will need to know the number of installed Java runtimes on the system, then know all of the local user accounts on the specific machine, and finally know the individual hardware identifier numbers for each machine. In OS X, not only are the Java preferences handled on a per-user basis, but their settings are stored in ways that require you to take into account various unique aspects of the individual system that you are managing. You can use Terminal commands to alter the settings necessary for disabling Java, but they are very dependent on the OS version and setup being used, resulting in the commands being quite extensive and complex. ![]() While an option to quickly disable Java system-wide would be convenient to have, unfortunately this is just not possible for how Java is implemented in OS X. I have been a sysadmin for a while but for the life of me I cannot find a plist or other file that holds the On/Off switch for enabling/disabling Java in OS X. Some people in these situations have been curious about options for adjusting these settings quickly via the command line.īecause of the flashback malware, I am looking for a solution to disable Java on dozens of Macs from the command line. Instead, to disable Java for the whole system you will need to make these changes for each user account on the system, and then do it for any new account you create.įor home environments with one system and a few user accounts this is not too difficult to manage however, it does impose a burden on those who manage multiple systems such as computer labs. This means that disabling Java for an entire system is not as easy as logging in as an administrator and unchecking the Java runtimes. The Java Preferences application is used to manage the per-user settings for the installed Java runtimes. The only options that Apple provides are to manage Java preferences on a per-user basis to prevent the Java runtime from being activated for that user, rather than doing so for the entire system. OS X has historically come with Java pre-installed, but even though it is optional in the latest version (OS X Lion), unfortunately once installed on a system there is no official way to uninstall it.
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