Just installed the AppCode 3.0 EAP build 137.48 and got a warning about not having the latest apple JVM installed to run AppCode itself. This was a bit confusing, since apple abandoned distributing JVMs for osx as of java 6. I have Oracle's java 7 and 8 already installed.
It turns out that I did not have the last java 6 update from apple installed, and installing it fixed the error message, but it surprised me to learn the IDE is still running on java 6. I was curious why you have chosen to remain on 6. I'm surprised there aren't performance benefits to the 7 and 8 JVMs that would make it a compelling upgrade.