Apparently, the download finished about 245,147 years ago

Today, I was updating my MacBook and the download was going smoothly; even when I saw how long it would take (or already took). 

Screen_shot_2011-09-14_at_6

See that, apparently, the update will take about -2147483648 hours. So the update finished about 245,147 years,  6 months, 12 days, and 20 hours ago. 

Screen_shot_2011-09-14_at_6

 

LOL