Hackers are always taking advantage of people, companies and government agencies that are slow to update their software with the latest security patches. This was shown dramatically by the data breach at Equifax where hackers took advantage of Equifax not downloading a software security patch in a timely manner.
Whenever new security updates and patches are issued, we provide access to these so that you can update your software to provide better security on your computers, smartphones, laptops and other electronic devices.  Updating your software with the latest security patches and updates as soon as possible is important because identity thieves and scammers are always finding and exploiting vulnerabilities in the software that we all use.  Delay in updating your software could lead to disastrous results.  However, it is also important to be sure that you are downloading legitimate patches and updates rather than being tricked by an identity thief or scammer into downloading malware under the guise of downloading a security patch or update.  These new critical updates from the Department of Homeland Security include critical patches for Apple’s macOS and iOS issued recently on an emergency basis to patch major problems with mac computers, iPhones and Apple tv.
TIPS
Here are the links to a list of all of the recent security updates as posted by the Department of Homeland Security that includes the important Apple updates: https://www.us-cert.gov/ncas/bulletins/SB18-001