So I'm writing a Java applet, which currently runs perfectly fine in windows using Java 6 in FireFox, IE, and Safari. I tried to run the applet on a Mac in Safari and it wouldn't initialize, no errors in the console. I compiled it using the 1.6 JDK, the mac is running 1.5 Java. The macbook is running Leopard 1.5.2. Why won't my applet run? JDK 6 not compatible with 1.5?