I have an iMac which is about a 2007-08 model. It had osx10.8 on it and I updated the software to osx10.9 the other day. Since the update it will not connect to ANY wifi network. We have tried multiple networks and it will not connect to any.
If I set the IP address to static it will connect but no internet access.
It detects all networks fine but just will not connect.