After installed mavericks i cannot sign in to my facetime and i messages. i tried it 100 times, but it is showing couldn't sign in check your network and try again. there is no problem with my network. if anyone knows the solution please help me .

After installed mavericks i cannot sign in to my facetime and i messages. i tried it 100 times, but it is showing couldn't sign in check your network and try again. there is no problem with my network. if anyone knows the solution please help me .

Hi,
What version of the OS did you upgrade from ?
Anything before OS X 10.8.2 may have an issue if the Logic/Mother board has been replaced and the Serial Number not "flashed" back to it.
In the Apple Icon menu use the About this Mac item.
In the new panel click twice on the line that tells you the current OS level
It will change to the Build number (and alternative count to the OS versions) and then the Serial Number.
If it is missing you need to get it replaced.
(It is supposed to be done on Repair or Refurbishment).
An Apple Store or Apple Authorised Service Provider as the best choices.
There are apps you can download (They are Mac Model specific) but needs careful typing as it is a once only trip.
8:56 pm      Sunday; November 24, 2013
  iMac 2.5Ghz 5i 2011 (Mavericks 10.9)
 G4/1GhzDual MDD (Leopard 10.5.8)
 MacBookPro 2Gb (Snow Leopard 10.6.8)
 Mac OS X (10.6.8),
 Couple of iPhones and an iPad
Message was edited by: Ralph Johns (UK)

Similar Messages

Maybe you are looking for