iPhone 12

After restarting both, this worked on the 2nd try. At least it appears to have. it is only copying a portion of my music at this moment. Apparently it doesn't like the music I purchased from Amazon and my CDs. I think that is a different problem that I will need to read up on. Thank you for your help

Yes, I got texted limited to get this started. So about a year ago I got my iPhone 12. I backup my iPhone(s) to my MacBook. When I got my new iPhone 12, I did a backup and it worked and still works today. What I don't think I paid attention to was the sync function. Today I found that I cannot sync even after doing a backup seconds before. Example, If I try to sync my music playlists, it tries for a few minutes and then an error message pops up saying that cannot sync because communication with the iPhone was lost. All the while, the iPhone icon shows in finder. I have tried using a cable and using Wifi, but there is no change. Its like there is something preventing the sync and it just dies out.

PS. I am running the most up today software on the mac and iPhone - just updated today. Also, used two different cables.