Resolve specific iTunes update and restore errors


When you're backing up or restoring your iPhone, iPad, or iPod touch, you might see an error message. Here’s how to resolve specific errors.


Try these steps first

Use the basic troubleshooting steps to resolve most backup and restore issues.

Advanced steps

If you tried the basic steps and are still seeing the error message, find your error number and follow the advanced steps below. 

1, 23, 4, 6, 9, 10, 11, 12, 13, 14, 16, 17, 20, 21, 23, 26, 27, 28, 29, 34, 35, 36, 37, 40,

Resolve communication issues

Related errors: 17, 1004, 1013, 1638, 3014, 3194, 3000, 3002, 3004, 3013, 3014, 3015, 3194, or 3200. These alerts refer to, say "There was a problem downloading the software," or say the "device isn't eligible for the requested build."

Check the hosts file or TCP/IP filtering, which might cause communication issues between iTunes, ports, and servers. 

Configure your security software

Related errors: 2, 4, 6, 9, 1000, 1611, 9006, 9807, or 9844. Sometimes as a result of this issue, a device might stop responding during the restore process.

Check your security software and settings, which can block ports and prevent connection to Apple servers during update and restore. 

Check USB connections

Related errors: 13, 14, 1600, 1601, 1602, 1603, 1604, 1611, 1643-1650, 2000, 2001, 2002, 2005, 2006, 2009, 4000, 4005, 4013, 4014, 4016, “invalid response,” and being prompted to restore again after a restore completes.

If there’s an issue with the USB port, cable, dock, or hub, or if the device becomes disconnected during restore, try troubleshooting the USB connection, then troubleshooting your security software.

To narrow down the issue, you can also change up your hardware: 

  • Use another USB cable.
  • Plug your cable into a different USB port on your computer.
  • Try a different dock connector (or no dock).
  • Add (or remove) a USB hub between your device and computer.
  • Connect your computer directly to your Internet source, with no routers, hubs, or switches. 

If you checked your connections and are still seeing the error message, check for hardware issues. 

Check for hardware issues

Related errors: 1, 3, 10, 11, 12, 13, 14, 16, 20, 21, 23, 26, 27, 28, 29, 34, 35, 36, 37, 40, 1000, 1002, 1004, 1011, 1012, 1014, 1667, or 1669. 

Try to restore your iOS device two more times while connected with a cable, computer, and network you know are good. Also, confirm your security software and settings are allowing communication between your device and update servers. If you still see the error message when you update or restore, contact Apple support.

Error 1015 might happen after making unauthorized modifications to iOS, also called "jailbreaking."

Use recovery mode to restore your device

Related errors: 1015, “The required resource can't be found.”

You might see these error messages if your device has a beta version of iOS or if you're installing an older version of iOS (downgrading). Use recovery mode to restore your device to the latest version of iOS.

Quit virtualization software

Quit any virtualization software (such as Parallels or VMware) that’s running on your Mac. Then use the latest version of iTunes to restore your device.


Important: Information about products not manufactured by Apple is provided for information purposes only and does not constitute Apple’s recommendation or endorsement. Please contact the vendor for additional information.
Last Modified: Apr 10, 2014
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