I would like to prevent iMac from bugging me with notifications concerning software update. Not that this is useless; its just that I use the iMac for work and cannot continuously do updates... I actually have to work. So I do updates, typically on the friday evening. I've checked around; however, there is nothing in SystemPreferences/Notifications, nor is there a Preferences for Software Update. And almighty google fails here. Anyone found/know how to do this ?