What you see
- The iPhone [device name] could not be restored. An unknown error occurred (4005).
What it means — Apple
One of these messages might appear if your device disconnects during the update or if your computer loses its connection with the device during restore:
What to do — Apple
- 1 Update your Mac to the latest version of macOS or the latest version of iTunes.
- 2 Connect your device to your computer using a USB cable. Locate your device on your computer.
- 3 When you see the option to update or restore, click Update instead of Restore. This reinstalls the software and keeps your personal data.
- 4 If your device starts up in recovery mode during an update, restore it instead of updating it. After the restore completes, set up your device from a backup.
- 5 Check for updates to your Mac or PC. If you restart your computer for an update, check for updates again after you restart.
- 6 Try to restore your device using another USB cable.
- 7 Try to restore your device on another computer.
- 8 If you still see error 9, 4005, 4013, or 4014 when you restore your device, contact us.
Read the full article for pictures and model-specific details: If you see error 9, 4005, 4013, or 4014 when you restore your iPhone, iPad, or iPod touch ↗