Apple itune update

VPN or proxy connections might prevent your device from contacting the iOS update servers. This is the last version that fully supports Macs with a G3 processor. With iOS 12, you can have your iOS device update automatically. As described in the Apple support page, this error has something to do with a problem with the USB connection to your device that is causing it to unexpectedly disconnect when syncing. Addresses other issues that improve stability and performance.