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Home > Java, Mac administration > Oracle Java 7 Update 51 blocks unsigned Java applets by default Oracle released Java 7 Update 51 on January 14th. As part of the installation, the Java security level is set by default to High. With this security setting, self-signed and unsigned applets are blocked from running. This can be verified by going to http://javatester.org/version.html, as this site use
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