Facetime not working in OS X
I have OS X and just downloaded Facetime. When I enter my apple id I get a red message that the registering device does not have the proper credentials. I saw earlier posts about going to Settings and then Network. I cannot find "Settings" to even get started. If someone has the patience for an old lady to walk me through this I'd appreciate it.
MacBook Pro (15-inch Core 2 Duo), Mac OS X (10.6.8)