Every time I switch on my iMac I have to go through System Preferences, network, to access the internet. It runs Mountain Lion OS. However my Macbook Pro which still runs Snow Leopard connects to the internet OK, from thew same wireless router. This sta
Every time I turn my iMac on it will not connect to the internet until I open System Preferences / network / Assist me. that reports that my internet access appears to be OK, and hey presto my web home page appears, and everything if ok. The same happens if I have opened Mail, nothing until I've gone through the above proceedure.
This has been happening for a week.
The iMac uses Mountain Lion.
I have no such difficulty with my Macbook Pro which runs Snow Leopard.
I have deleted the safari caches and logs, to no avail.
Any suggestions would be greatly appreciated.
Deerick.
iMac (27-inch Mid 2011), OS X Mountain Lion (10.8.2)