Actually, because of their superior ability to deal with graphics, Macs are fairly common in journalism.
Despite a full-court press by the central Computing and Network Services department to standardize our university on Wintel boxes, Journalism and Architecture are Mac-only. (My department is a Unix/Linux network with a few Windows hold-outs: even the front office now uses Linux as the default OS.) Somewhat amusingly, our student union computer store, while it stocks Windows machines, plainly favors Macs: there are a lot more of them on display, and they are placed much more prominently.
(Personally, I have a guild-loyalty to the two dominant Unix-syntax OS's: the Free BDS kernel--underlying Mac OS X--was written by a categorist who went into CS, and Linux was boot-strapped up from Minux (a demonstration OS for student projects), which was also written by a categorist.)