Well you could also just get a z/OS mainframe or AS/400 and never worry againUh..err It is less secure... The Macs have an unfortunate history of falling first since Vista was released. Just google pwn2own and you will see the results of all the fun hacking contests. I run Linux, bsd and Windows OSes the real threat is the Apple "Genius" that gives the false sense of security to a computer purchaser just so they can make a sale. The word virus is throw out there because that is what people associate with MS products. Computer security is multi layered and the OS being protected is only a fraction of the total use of a system. Apple users ignore all the other threats and soon fall victim without even knowing it.
Apple put in malware protection to their OS in a recent upgrade.
All PC platforms are hackable, just depends on what you know, hence the initials "PC", its not a business machine, don't know why Businesses don't understand that when it comes to $$. I still know of no one personally that has had a virus on Apple, every Windows user I know has had one regardless of what is read on the internet. I've worked on both platforms since the late 80's.