Security Update 2017-001 Download Links:
Download Security Update 2017-001 (El Capitan):
https://support.apple.com/kb/DL1914?locale=en_US
http://support.apple.com/downloads/DL1914/en_US/SecUpd2017-001ElCapitan.dmg
Download Security Update 2017-001 (Yosemite):
https://support.apple.com/kb/DL1915?locale=en_US
http://support.apple.com/downloads/DL1915/en_US/SecUpd2017-001Yosemite.dmg
https://support.apple.com/kb/DL1914?locale=en_US
http://support.apple.com/downloads/DL1914/en_US/SecUpd2017-001ElCapitan.dmg
Download Security Update 2017-001 (Yosemite):
https://support.apple.com/kb/DL1915?locale=en_US
http://support.apple.com/downloads/DL1915/en_US/SecUpd2017-001Yosemite.dmg