How do I control when an untrusted applet or application runs in my web browser?
This article applies to:
Java 7u10 introduces the ability to manage when and how untrusted Java applications (i.e. an application that is digitally signed by an unknown publisher, or a certificate that has not been issued by a trusted Certificate Authority) will run if they are included on a web page. Setting the security level within the Java Control Panel will determine whether
Setting the Security levels through the Java Control Panel
Security levels in the Java Control Panel
Very HighThis is the most restrictive security level setting. All unsigned and self signed applets and applications are blocked and will not run. Only apps that have an associated certificate from a trusted authority will run after presenting a prompt.
HighThis is the minimum recommended (and default) security setting. Unsigned and self-signed sandbox (limited access) apps will not run on old or expired Java versions. All applets will present a security prompt before they can be run.
MediumAll applets can be run only after a security prompt is presented. Selecting the Medium security level is not recommended and will make your computer more vulnerable should you run a malicious application.
Use search to find the Control Panel
Mac OS X 10.7.3 and above