Physlets run in a Java-enabled browser, except Chrome, on the latest Windows & Mac operating systems. If Physlets do not run, click here for help updating Java & setting Java security.

Java Security and Browser Settings

NOTE: As of April 2015 Google Chrome has disabled plugin support necessary to run Java applets, such as Physlets. Other browsers (Firefox, Safari, and Internet Explorer) still support Java applets.

Java Control Panel Security Settings

Oracle has changed the level of Java Security in the Java Control Panel necessary for running Physlets. The level of security in the Java Control Panel now needs to be at High. The following two documents describe how to check the Java Control Panel Setting is set to High on both Windows and Macintosh computers:

Windows Settings | Macintosh Settings

Browser Settings for Java

In order to secure Java over the past year, Oracle has also changed the way one interacts with Java applets in a browser.

Windows and Firefox and Internet Explorer

On Windows computers, the Security Warning dialog sometimes flashes and is placed beneath the web browser. This may lead you to think that the web page has frozen. It has not; it is waiting for the applets to be unblocked. Navigate to the warning by clicking on the Java icon in the taskbar and select Don't Block.

Macintosh and Safari

On Macintosh computers, the Security Warning dialog sometimes flashes and is placed beneath the web browser. This may lead you to think that the web page has frozen. It has not; it is waiting for the applets to be unblocked. Navigate to the warning by clicking on the Java icon in the dock and select Don't Block.

Additionally on Safari, navigate to Preferences and select Security, then select:

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