1.更换一套SMBIOS；

2.用Apple ID登录iMessage、FaceTime；等顾客代码出现，记着你的顾客代码；

3.然后联系Apple客服，提供序列号和顾客代码给客服，等客服处理好就可以登录了。注意态度要好点。

如果你之前来回CLOVER和OC切换那么请记得清除缓存：

sudo rm -rf ~/Library/Caches/com.apple.Messages*
sudo rm -rf ~/Library/Caches/com.apple.imfoundation.IMRemoteURLConnectionAgent*
sudo rm -rf ~/Library/Preferences/com.apple.iChat*
sudo rm -rf ~/Library/Preferences/com.apple.icloud*
sudo rm -rf ~/Library/Preferences/com.apple.imagent*
sudo rm -rf ~/Library/Preferences/com.apple.imessage*
sudo rm -rf ~/Library/Preferences/com.apple.imservice*
sudo rm -rf ~/Library/Preferences/com.apple.ids.service*
sudo rm -rf ~/Library/Preferences/com.apple.madrid.plist*
sudo rm -rf ~/Library/Preferences/com.apple.imessage.bag.plist*
sudo rm -rf ~/Library/Preferences/com.apple.identityserviced*
sudo rm -rf ~/Library/Preferences/com.apple.ids.service*
sudo rm -rf ~/Library/Preferences/com.apple.security*
sudo rm -rf ~/Library/Messages