Resolved iTunes couldn’t sync music on iPhone after upgrade to iOS 12

[mikezang]

Before I upgrade to iOS 12, my iTunes on Mac is no any problems to sync music to iPhone.
When I upgrade to iOS 12, I found iTunes not yet sync music to my iPhone, I got message that this computer not authorized this computer, I tried to authorize by Account menu but I got the same result. What can I do?

 

[mikezang]

After update security 2018-004 and change apple count password, now iTunes 12.8 can sync music to my iPhone6plus with iOS12.