The OS X test hung and was killed after 2 hours running the test_wt2834_join_bloom_fix test. It was running changeset 6226cdaa9. That change has no modifications relating to LSM in it and is unlikely as the source. Later merges to develop have passed so this is likely a transient hang. I am not able to readily reproduce it on my 10.12 OS X laptop.
One recent merge into develop that does relate to LSM is d3e44b5a9ba.