I remember a day years ago when a web designer in our creative group brought his own Mac G4 to the office and managed to elicit a derisive snort from IT. "You don't honestly think we're going to support a Mac, do you?" The IT guys didn't want (or know how) to support a device that wasn't a PC.

Of course, looking back, I wonder if part of the problem might have been cultural; the IT guys didn't care for those rogue, black-clad creative folk, slumping in their chairs and listening to bass-thudding techno. They scoffed at the creative types who clicked away their days with design software, sitting at darkened workstations and relishing the perpetual sport of disconnecting the fluorescent ceiling
tubes as soon as the confused maintenance guys popped them back into place. Good times.

These days, even in an enterprise environment, it's probably more unusual for a creative team not to work on a Mac.