This is far from try any longer. My current employer is about 75/25/5 OS X/Windows/Linux for end user machines. The Windows boxes are used by the business types, while the devs and designers use OS X. The prod systems are Linux, and the devops are also Linux.
Yes and no - they are a standard system that is popular, the laptops are relatively sturdy and the IT expertise on adminning macs is pretty widespread.
Note, look at how many startups and techies use macs as primary dev machines - most people in the tech "scene" seem to. Popularity and bandwagons have some level of merit.
> There's a reason that no business will use Apple computers.
You may wish to update your assumptions. That was a relatively viable statement to make in 2012. In 2014 -- with businesses like Google going effectively Apple-only -- it's not.
I suspect the whole thing is bordering on a tautology.
Most of what Google do involve the web. And most web design (note the design part) courses puts a focus on Apple products. This in part because they grew out of print media courses etc.
Some businesses do use Apple products (typing on mine right now) but the biggest reason most don't is their lock in to the Microsoft ecosystems. Most of them use Active Directory and have corporate standards that make them use Microsoft because their IT teams require it.
Apple lock-in is horrendous and nobody wants to be tied to a single provider for all their hardware.