Can't sign into iMessage..after Mavericks upgrade

Question

I have upgraded to Mavericks and I am trying to open iMesage but this login gif image constantly rolling .
I cant log into it..is there any remedy available..

Answer 1

After a lot of exploring I finally found the problem with my case.
I have my  logic board replaced by the apple service centre couple of years back. Which caused the vanishing of my serial number. I dont know what made it vanish. But u see this was the case.
Now why I am talking about the serial key has reason behind it. To use iMessage and Facetime apps we got to have serial number in our firmware. Otherwise it keeps showing me some connection errors while setting up the iMessage.
The legitimate and safe way to enroll your serial number back to your machine is to go to Apple store and tell them the issue. And they will do the needful. We can get the serial key from the surface of the product, product invoice or the packaging box.
I have not tried that after enrolling my serial key back to the machine, my iMessge and Facetime will start working. But its worth a try because missing serial key is a serious issuue. And it may cause some apps to work in a way which you dont anticipate it to.
So if you also suffer from the same problem, dont forget to check your serial key. And in case it is affirmative then do visit the Apple Store and resolve the issue. Although i hope Apple should release an update for those suffering with missing serial key and fix the issue. But untill then we have to find our nearest Apple Store.