Willi wrote:

That's mainly because Linux and Mac aren't popular enough for the
hackers to make the efforts needed to spread viruses. If either system
was used as widely as as Microsoft, they'd be the ones that were getting
hit.

That's a big factor, but it's not the whole story by a long shot. Both
Mac OS and Linux are "fresher" operating systems than the various
flavors of Windows. They've inherited less legacy code, suffer less from
code bloat, and are generally more comprehensible and maintainable. You
can add to that the tendency of Microsoft to tightly integrate non-OS
applications (like Explorer) into Windows (for competitive reasons, to
exploit their near monopoly), in opposition to good software-engineering
principles.

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