Originally Posted By: grelber
I have no problem with the network connection because I'm on it and everything else works just fine.

I've shut down and restarted the machine several times. This has achieved nothing except saving electricity.

Since OS X, itself, directed you to Network Diagnostics, and considering your newness to OS X, your own analysis of your situation and resultant decision to ignore ND seem to me to be contrary to the best interests of a user who is really trying to help himself; I haven't got a clue what ND may have reported, nor, most assuredly, have you.

My suggestion was not to just shut down your iMac and start it up again; I posted a list of steps to be performed prior thereto. (Ref. previous paragraph.)

The new Great Equalizer is the SEND button.

In Memory of Harv: Those who can make you believe absurdities can make you commit atrocities. ~Voltaire