Hello! I have an Early 2008 iMac that has an odd issue. Whenever it connects to our home wifi, the entire network is slowed down. I've reinstalled 10.9, but it still does it. Yes, I am sure it is the iMac, whenever you turn Wifi off on the iMac, the network returns to its normal speeds (4MbD vs 30MbD). Any suggestions as this seems like a really odd issue.