I just bought a new Late 2013 rMBP and I'm having a problem with my iMessages. The problem I have is its not syncing my old conversations from my iPhone/iPad/iMac/old MBP. I've logged out of both my iCloud and Message apps several times to no avail. I just did a restore which didn't fix anything. All of my other Apple devices have no problem updating old messages whenever I've done restores or bought new devices, this is the first one I've had any problems with. Any help would be appreciated.