Kandarim wrote:starting it from the console Java 7 is required for my client: unsupported major/minor version means that the default java binary from your terminal is too old to run the jar. As Ender's only requires java 6 (iirc) this is probably the reason why one works and the other doesn't.
For the record, simply launching the jar file will never work because the server url needs to be passed as an argument to the jar - see the first post for how to do that.
the problem is that updating to Java 7 is not an option as the evil mac-right-click bug will strike then.