Feelix wrote:
Before I had a chance to pursue a fix, my problem worsened and now neither my facetime or imessage work at all. They will appear to call / send a message but it will always fail in the end...
MacBook Pro (Retina, Mid 2012), OS X Mavericks (10.9)
Such problems can be caused by a wide variety of problems including software,your Mac's hardware, your internet connection or service, or even problems at the other end of the connection you are attempting.
Use FaceTime for Mac: Troubleshooting FaceTime to troubleshoot the problem. Then you will know what issue(s) you must correct for proper performance. Once FT is working, you can see if its solution has fixed your trouble with iMessages.
iMessages is an iOS app that is not part of your Mac. However, when your Mac is working and your Mac's Messages > Preferences... > Accounts are properly configured, your Mac's Messages app can send and receive text messages to and from the iMessages app on iOS devices.
If you get your Mac's FT working, but the iOS user(s) iMessages problems continue, you can troubleshoot using relevant articles from this search of Apple Support Articles. Something there should help you narrow down the possible problems you must investigate and correct for proper iOS iMessage function and interaction with your Mac's Messages.
Feelix wrote: ... People have discussed my new problem in the forums and stated that reinstalling the os does not help. The only thing suggested is for serial key errors but my serial key is not missing.
I do not understand the "serial key errors" context. However, if you continue to believe that your troubles are caused by "serial key errors", I suggest you close this topic and pursue resolution in the other forums to which you refer. I and others who may have suggestions relevant to the circumstances you describe here will watch for your status update.
Message was edited by: EZ Jim
Mac OSX 10.9