Hi guys, finally got my imac but it keeps disconnecting from wifi whenever it goes into sleep mode after inactivity. Not sure if this is a bug or expected behavior, either case is there a way to prevent wifi from disconnected? The reason is I still want to be visible online in aim while away/inactive, so my friends can continue to send me messages and when i come back i can see it. However as it is now, my wifi gets disconnected so aim goes offline too. I have latest imac mountain lion connected via wifi to airport express router. Any help will be appreciated.