Security Update 2018-001 is recommended for all users and improves the security of OS X.
For more information on the security content of this update see: http://support.apple.com/kb/HT1222
See http://support.apple.com/kb/HT5044 article for details on how to verify the authenticity of this download.
Post Date: Jan 23, 2018
File Size: 863 MB
OS X El Capitan 10.11.6