OS X El Capitan 10.11.5 Update

The OS X El Capitan 10.11.5 update improves the stability, compatibility and security of your Mac, and is recommended for all El Capitan users.

For more detailed information about this update, please visit:  https://support.apple.com/kb/HT206230

For detailed information about the security content of this update, please visit: https://support.apple.com/kb/HT201222