Download Links: Download Security Update 2016-003 (10.11.6) - Jan 17, 2017: https://support.apple.com/kb/DL1907?locale=en_US http://support.apple.com/downloads/DL1907/en_US/secupd2016-003elcapitan.dmg Download Security Update 2016-003 Supplemental (10.11.6) - Jan 17, 2017: https://support.apple.com/kb/DL1908?locale=en_US http://support.apple.com/downloads/DL1908/en_US/secupd2016-003supplemental.dmg About the security content - Jan 17, 2017: https://support.apple.com/en-us/HT207423