On OS X 10.6 ("Snow Leopard"):
“Inactive Plug-in” appears when attempting a CreationStation or CMC/Kiosk upload.
On OS X 10.7 ("Lion") and OS X 10.8 ("Mountain Lion"):
“Missing Plug-in” appears when attempting a CreationStation or CMC/Kiosk upload.
On October 18, 2012, Apple released OS X updates that proactively disable and/or remove Java on OS X 10.6, 10.7, and 10.8.
Re-enable Java Applets
Method 1: Re-enable the Java applet by clicking the applet region labeled "Inactive plug-in".
Method 2: If the Java applet cannot be re-enabled directly on the web page, re-enable Java applets in Java Preferences:
Install the latest version of Java 7 applet plug-in from Oracle by clicking on the region labeled 'missing plug-in' of using the link below.
OS X 10.6 Support Information from Apple:
OS X 10.7 & 10.8 Support Information from Apple: