There is a bug in snappy 126.96.36.199, that makes it not work when using java 7, on MacOSX. This issue is fixed in snappy 1.0.5. We've confirmed this locally.
So, the kafka distribution should update the KafkaProject.scala file to call out version 1.0.5 instead of 188.8.131.52. I believe this file is used when generating the pom.xml file for kafka.