For those of you who like a practical joke, here's a really simple way to convince people that any Mac is magically running Windows.
First off, on a PC (this is the dirty part of the job) take a screen shot of the desk top, import it into PhotoShop or similar and save as a jpeg. Transfer the file to a Mac and put it in the Desktop pictures folder. Now go into Desktop & Screen saver in Preferences to set up your PC screenshot as a screen saver. Set the time for about 15 minutes.
I did this to a complete newsroom, set up to produce a daily paper for a convention. For the first few hours. everyone was was working too hard for the screensavers to kick in but when they returned from covering stories or grabbing lunch, their machines had changed platforms! As I was doubling up as on-site tech support, I could then make a great show of not knowing what could possibly have happened.
If everyone who is now in on the gag keeps schtum, you can get a new sucker every hour.
A variation on this theme is to set up a screen saver with a shot of the actual desk top, with an open Word file containing a totally libelous story about a key advertiser. 'Microsoft Links to Mafia Proven' is the kind of headline that makes grown publishers faint. Just don't get caught.
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