Sorry, Michael, but the security by obscurity canard has been blown up, shot down and skewered so many times it is really been proved not true. Just one example will prove the point. A decade or so ago, the Windows Witty Worm was released into the wild six months after the security hole it exploited was already patched in the Black Ice Fire Wall it targeted. All but approximately 18,000 Windows Computers around the world using the Black Ice software Firewall had been brought up to the latest version that was not vulnerable to the Witty Worm. Within 35 minutes of the Witty Worm being released into the wild, ALL ~18,000 Windows computers, no matter where they were in the world, were infected with the Witty Worm, and were now reporting back to the Worm's creator's server to download more malware.
Malware has been written to exploit devices that were running obscure Operating Systems with as few as 75 units.
The Mac OS has over 100,000,000 computers in its installed base, yet no one has ever successfully written a computer virus, worm, or self-installing, self-propagating, or self-transmitting computer virus of any kind for Apple OS X, or its current successor macOS. Any malware for the Apple OS requires the participation of the user who KNOWS the Administrator NAME and PASSWORD to download it, install it, and to even run it for the first time, and that name and password MUST be entered at each of those steps, it is NOT just click OK and continue on one's merry way to infection.
It requires INDUSTRIAL STRENGTH STUPIDITY plus knowledge of those administrator passwords to infect a Mac. While not, perhaps as anally protective as the Mac OS, the same holds true with Linux machines. Both systems are based on operating systems that were built from the ground up with security in mind. Apple is UNIX™, while Linux is a clean room work alike clone of UNIX without the trademark. Windows has had to back its way into security.
I would actually suggest that the a fully up-to-date Mac may be a little bit MORE secure than Linux at this stage. Apple's distribution comes with the SuperUser inactive by default and there is one higher stage user than even the SuperUser now on all new Macs that requires a SYSTEM password to make any changes to Firmware and certain SYSTEM LEVEL software that is missing on Linux. That alone increases the level of security of the Mac.
Would largely agree with that. I'm willing to accept the marginal difference in security on Linux as a trade-off for the added flexibility I get with it.