When all devs need is your software (xcode), but you are so popular they they buy your hardware anyway instead of looking at alternative platforms.<p>Although I see the why, the how and the need, it is entirely synthetic. In a way Apple forces this incredible waste of hardware that is never seen and could easily be virtualized and time-shared (there are no technical limitations). It's really an opposite-of-green initiative. Although, perhaps the only real alternative would be everyone buying a mac mini and use it even less (in total), which would be even less green...