Either use your Apple Care/Warranty to contact Apple. If you have either a NULL or invalid Serial Number, please do one of the following: Check this in your Mac’s ‘About’ section. Whether it’s real or virtual machine, the Serial must be less than 12 chars - otherwise, iCloud -based services like FaceTime and iMessage won’t be able to sign in (or will ‘hang-up’ at sign in attempt). Sudo launchctl load -w /System/Library/LaunchDaemons/įinally, please check to make sure that your OS X device has a (valid) Serial Number. We’ll then ensure that the proper LaunchDaemons are running - in this case, Push Notifications. We’ll start by deleting the following file (admin permission required):
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