I did a clean install of Mountain Lion 10.8.2 on my MacBook Pro. Now I am facing some problem while loggin into Facetime and Message (could not sign in please check your network connection and try again). In console I am getting this message.
apsd: Certificate not yet generated
Best Answer
A possible solution is to change your DNS server settings.
I had this problems for a while, and a friend too, and the solution that worked for us was just changing the DNS servers to Google's DNS.
To do this, go to System Preferences > Network > Advanced > DNS >
Then press the + button on the left below DNS Servers, and add both:
8.8.8.8
and
8.8.4.4
Hope this helps!