http://www.kenrockwell.com/apple/why-pros-use-mac.htm
When people speak of computer problems like viruses, reloading operating systems, crashes, DLL errors, spy ware etc., they are referring to Windows-specific problems, not computer problems. Mac users hear about these things, but rarely if ever have to deal with them. I'm speaking from experience, not trying to incite hate mail. I'm sure a Windows Jihad member could send me some sort of virus, just that I don't get a dozen a day as I did on Windows. Viruses are the "59,940 reasons to reconsider Macs" (front cover of Consumer Report's December, 2004 issue).
Would you drive a car that died on you while driving and needed to be reset and tweaked every other trip? Not me. There's no excuse for balky computers, either. Remember cars from the 1950s, which needed complex tune-ups every 2,500 miles and even starting and running when cold was never a sure thing? Today cars all start and run perfectly, have twice the power and better gas mileage, too. This is because they are all computer controlled and self-adjusting. They run great because auto makers use their own proprietary operating systems, NOT Windows. Windows has no excuse for not running flawlessly after 20 years of development. Complexity is not an excuse: even the crappiest car today has dozens of networked computers controlling everything and runs great, compared to 20 years ago when cars still used mechanical carburetors. I suspect Windows, in my experience anyway, runs like crud deliberately.
It's not so much the hardware as the software. The chips and hard drives and screens all come from the same places. The problem is that Windows has always been a buggy science experiment that left a lot of problems for users to figure out on their own. Apple has always done their homework to ensure that the computer knows how to do its own internal work so you don't have to. Microsoft always expected people to learn how computers think. Apple teaches its computers how people think. Steve Jobs gave away Apple's secret in a Forbes interview a short while back: it's all about the user experience, which is all about the software which is the Mac operating system, iPod, and everything they do. The people I've met at Apple reinforce how Steve drives it into everyone's heads that it's their job to ensure that you and I have a great time using our Macs and that everything needs to be obvious, simple to use and just work. They're not allowed to stop their design 90% of the way through and hope the users figure it out. It's Windows software that makes PCs so aggravating, not the computers themselves.
Unlike Nikon vs. Canon, Coke vs. Pepsi, Rock vs. Disco or BMW vs. Mercedes dickering, there is a real difference between Mac and Windows when you work on your computer all day. (Apple has a larger share of the computer market than BMW and Mercedes have combined in the auto market.)
You don't need a dedicated support department to keep a Mac running. Computer support departments HATE Mac because Macs don't need computer support departments. You'll never get your company's help desk to suggest Mac because they know they'd be unemployed. Fast. Macs aren't perfect, but close.