Yesterday I ran into a little problem running Slick 2D on Java 6 64bit on my Mac. It’s a MacPro, which has a 64 bit processor and is running Leopard. The problem I encountered was related to the native libraries provided by LWJGL.
If you’re a user of LWJGL, you’ll be using JInput as well. Unfortunately, JInput does not currently have any 64 bit native libraries as it is only providing for PPC and i386 (32bit). This is a problem because Mac OS X users are somewhat bound to Java 6 64bit. There is no 32 bit version of Java 6 for Mac OS X.