Whenever I have iTunes open I receive an error message saying that iTunes cannot connect to iTunes Store purchases. This is the message: iTunes cannot connect to Store Purchases. If you have any firewall software, make sure it has been set to allow communication on port 443. I don't appear to have any problem, but I can't remedy the appearance of the error message. When I go to Firewall in the Security and Privacy Preference, I can't find any way to check communication ports, so I'm at a loss. Suggestions, fixes, any help at all will be greatly appreciated.