If you see an error code or alert while updating or restoring your device, learn what to do.
Update your Mac. If you're using a PC, make sure that you have the latest version of the Apple Devices app or iTunes.
Plug your iPhone, iPad, or iPod directly into your computer's USB port. Don't plug it into an attached keyboard or USB hub.
Make sure you unlock your device. If prompted, trust your device.
If you still see an error alert, try a different Apple USB cable. You can also switch to a different USB port on your computer.
Turn off your computer.
Turn on your computer
Restart your device.
Learn how to restart your iPhone, restart your iPad, or restart your iPod touch.
You might need to update, change, or uninstall software that's interfering with your computer's connection. This includes the Apple Devices app or iTunes.
Update or restore your device on another computer that uses a different network.
Choose the error code or message: