Recently I needed to migrate from macOS El Capitan 10.11.6 to High Sierra 10.13.4 and to my surprise iTunes 12.7.x does not sync Apple's AddressBook to my iPhone 6s iOS 9.3.4 to Contacts. The installation of macOS was a clean install, not upgraded. I've reset the iPhone to factory settings for a clean install as well. What I'm unable to figure out is why can't this basic feature work. There are no errors or warnings of any kind. Apple won't permit us to uninstall iTunes and install earlier versions. Has anyone else run into this issue and if so have you found a solution? The use of iCloud is not an option. --------------------------- Alternate thoughts... 1. See if there is a way to install two versions of iTunes at the same time, assuming of course one cannot uninstall the current version. 2. I've tried installing VMware Fusion 10 with El Capitan 10.11.6 and sync that AddressBook with my iPhone however iTunes can't see it mounted that way through the USB cable. 3. I've not found a 3rd party app that will sync specific Groups in Apples AddressBook the way iTunes allowed me to. I use this to sync only a subset of all contacts since I don't need all contacts on my iPhone. Does anyone know of a 3rd party app that can do this?