Not entirely true. Some AV software runs heuristics that look for patterns of software behavior that might be dangerous, even if they don't recognize the virus because it's a new one.
Of course the problems with heuristic approaches are:
How right you are. No system is foolproof. Only fools trust their operating system to protect them. Follow best practices and hope for the best. Things like:
1. Running antivirus
2. Running malware scans often
3. Running hardened firewalls, even in hotels and on public connections
4. Staying away from questionable sites
5. Run ad-blockers
We live in a connected world. We need to be part of the solution, not the problem.
I posted this article because it’s clear that many Apple and Unix users on here don’t think it’s their responsibility to be network-safe for all other operating systems. Many tend to make excuses due to some sort of elitist attitude that Apple doesn’t have any holes at all.
We all need to protect friends, coworkers and loved ones from threats they could receive from us, knowingly or not. I can tell you with no hesitation that if I didn’t care enough to clean up my emails and not pass this stuff onto my family, they would be quite upset if I was so arrogant to not care.