You have to build the bluecore gpl library for Mac OS X 64-bit arch.
Unzip the archive, open a terminal and build the source code
$ cd bluecove-2.1.0
$ sh build-native-osx.sh # this script needs Xcode!!!!
$ file ./src/main/resources/libbluecove.jnilib
./src/main/resources/libbluecove.jnilib: Mach-O 64-bit dynamically linked shared library x86_64
You find the shared library in bluecove-2.1.0/src/main/resources/libbluecove.jnilib
====> you have to update your java.library.path with the path containing the new shared library !!!!
For example,
java -Djava.library.path=$PWD/bluecove-2.1.0/src/main/resources ....
In attachment, you can find my shared library.