The iPhone could not be synced because the sync session failed to finish.

Tom Hummert,

Depending on your operating system, iTunes, can be an option for use. If you're using a newer macOS, make sure you're running the latest available macOS. If you have any third party security software or VPN installed, disable it and try syncing.

Be sure your iPhone is connected directly to your computer and not through a hub, or the keyboard. If available, try using a different cable to connect to your computer.

Regards.

Hi Tom Hummert,

Thanks for posting in Apple Support Communities.

We understand you're unable to sync your iPhone. Make sure you're syncing with computer that's running the latest operating system and the latest iTunes version, if you're using iTunes to sync. Make sure your computer has available storage and that it has been restarted.

Sync your iPhone, iPad, or iPod using your computer

Regards.

Hi,

I also can't sync my iPhone. I have made sure that both the MacOs on my computer and iPhone are completely up to date (Monterey 12.2 and iOS 15.3 respectively), I have rebooted both devices, and I still get the error. What can I do to fix it?

It was synchronizing before I upgraded to Monterey.

thanks,

Sandee