Mac OS 10.11.3
See my post here 801283.aspx
This bug first appeared when attempting any search:

Indexing appeared to be progressing normally when I went to bed last night, but this morning the Indexer Log shows that indexing has failed. The key error seems to be
[quote]
Got a SIGABRT while executing native code. This usually indicates
a fatal error in the mono runtime or one of the native libraries
used by your application.
So it would appear that the updates to Mono in 6.10 beta 1 introduced a fatal error. Full Logs are here—
2388.LogosLogs.jackcav.20160205-064818.zip