If you do not have the Java Preferences.app installed, and still running a Java version Restart the browser and attempt to download.In the Network tab uncheck the 'Keep temporary files for fast access'.Open java preferences=Double-click on Java Preferences.app.Go under Applications, and from there to Utilities.if you have the Java Preferences.app installed (/Applications/Utilities/Java Preferences.app) then please:.What to do if you experience some issues while opening the Download Manager The Download Manager has been tested on the following configurations: OS In general, for the above reason and also given that all ESO tools are moving towards Java 1.7, we encourage you to move to Java 1.7 in the near future. Various Java tools on the Mac are now configured with reference to the Java runtime with the highest version number, ensuring that Oracle Java 7 or later will be used once it is installed, regardless of any other runtimes that may be present. Starting with OS X 10.7, Apple has removed the Apple's Java Preferences utility in favor of Oracle's tools. Apple has progressively moved away from in-house support for Java.