Earlier this week, the Fremont City Council halted attempts at designating the first Macintosh factory as a historic site, the San Jose Mercury News reports. The city had been hoping to use the building to promote Fremont, both in terms of history and importance to Silicon Valley. Staff recommended dropping plans, though, when it was pointed out that the factory is 30 years old, and therefore too young to meet state or federal criteria for becoming a historic site. In general, buildings can only become historic when they're at least 50 years old, says Fremont planner Kelly Diekmann.