The Mac OS has long been known as an operating system for graphic artists, creative folks and those who prefer to treat their personal computers as, well, personal. Widespread business use is almost unheard of. But lately there's been a lot of discussion that Apple may be about to make a big push into the enterprise market. Here are four stories about people and companies whose positive thoughts about their Windows-based PCs may be waning.

Web Development firm switched to Macs just last month

Glenn Romanelli, owner of Lightaus Designs, Inc., a Web development firm l in Smithtown, NY, says that although there are still a few PCs around the office, they will eventually be weeded out. Making the transition, Romanelli says, was a "no brainer."

"Have software that will only run on a PC? No problem," recounts Romanelli. "There is software for the Mac called VMWare that will run Windows like an application on the Mac." Using VMware, he says, you can install any Windows software you need and work just like you're on a PC. "Plus, there's no need to reboot to do this. As far as Microsoft Office goes, there is free software available for download on the Mac called NeoOffice and it will open and save Word docs and Excel files the same way Microsoft Office does." (For more free Mac software, see Seven Open-Source Mac Apps You Need Right Now.)

Even better: it saved the company money.

"Believe it or not, it was a cost issue. It was actually cheaper to buy iMacs than comparable PCs. A few years ago, this wasn't the case," Romanelli says.

Although cost is a determining factor for some, others' decisions are user-friendly based.

A tale of two medical centers and the OSs they run

For years, John Halamka, CIO of Harvard Medical School, in Cambridge, MA and CareGroup, located in Boston, MA, which runs the Beth Israel Deaconess Medical Center, was a self proclaimed "tried and true" Windows user. But now, Halamka's family has Macs and he uses a MacBook Air.

But these days, says Halamka, "a platform shouldn't matter. Use what you prefer."

According to Halamka, Beth Israel has 8,000 PCs and 4,000 PCs and Harvard Medical has 4,000 Macs. Why the difference between the two places? "For a public access kiosk, a PC is better," Halamka says, referring to Beth Israel's computer system set up. " Apple just isn't there yet," Halamka adds.