In school I was also taught to stay on top of any tech news,..thus I read anything that I see hit the media on technology that I find,...seems apple recently had good reason to send an update that addressed some major security issues and flaws in their network structure,If you keep on top of technology news, apple has not got a good track record of addressing issues promptly , to eliminate issues,.....I did the update for my son's new macbook pro and encountered this false idealism amongst mac owner's within my own family and once I took the time to explain the problem with this attitude and the popularity and vulnerabilities of the latest mac devices making them a primary target for hackers and malware providers simply because of this ignorant attitude by the mac users I convinced him of the need for virus and malware protection on his mac unit,...needless to say if you think because you use macintosh hardware you are invulnerable to any mailicious attacks and or needs for software updates,...you well deserve the bullseye target you've sewn on your own butt.
edited to add,....in school when we were studying the issue of updates and software patches the first thing explained to us was that there are updates and patches for any operating system used,...no one particular operating system could continue to function if they didn't address any issues that arise as time passes or it would promptly become obsolete,...this goes for microsoft, linux, apple,android,and even google,..just to mention a few of the most popular operating systems among the many others out there now and that are becoming available on a continually evolving basis