When running love from command line on El Capitan, I get the following message, although the game runs fine:
2015-10-16 11:17:49.928 love[21778:2156666] 11:17:49.928 WARNING: 140: This application, or a library it uses, is using the deprecated Carbon Component Manager for hosting Audio Units. Support for this will be removed in a future release. Also, this makes the host incompatible with version 3 audio units. Please transition to the API's in AudioComponent.h.
It doesn't happen when run from an empty game, but is rather annoying.