As noted previously the Summer 2015 release did not build or run on the new Mac OS X El Capitan that was released at around the same time.
Work on fixing this is complete and users can now install the w_2015_47 weekly tag:
eups distrib install -t w_2015_47 lsst_apps
lsstsw users can pick up current master.
Details of the underlying issues with El Capitan and the required fixes can be found in the DM TechNote DMTN-001.
There is one known issue related to installing a fresh lsstsw system on El Capitan relating to the removal of OpenSSL: DM-4359.
