iPhone Won't Restore? Fix Error 4013 in iTunes and Finder

You plug your iPhone into your computer, put it in recovery mode, and hit Restore. Halfway through, iTunes or Finder stops and throws Error 4013. You unplug, retry, and it fails again. This usually happens with iPhone 8 or later, but I've seen it on older models too.

The frustrating part? The phone isn't bricked. It's a communication failure between the iPhone and your computer. The restore process stops because the connection drops or the firmware transfer gets corrupted. Here's the thing: 4013 is rarely a hardware failure. It's almost always a dodgy cable, a dirty port, or a Windows driver issue.

What Causes Error 4013?

Error 4013 means the device unexpectedly disconnected during the restore. The firmware (iOS) is being written to your iPhone in chunks. If a single chunk doesn't make it through, the process aborts. Three common culprits:

• Bad cable or loose connection – even a slightly frayed Lightning cable can cause this.
• USB port or hub problems – power fluctuations or a flaky USB 3.0 port can interrupt the transfer.
• Windows USB drivers – outdated Apple Mobile Device USB driver is a big one on PCs.

Don't panic about data. A restore wipes your phone, but if you have a backup, you'll get everything back. If you don't, you might still recover it later. But first, let's get the restore to actually finish.

Fix 1: Use a Different Cable and Port (The 90% Solution)

I know it sounds too simple, but this fixes most cases. Apple's Lightning cables are notoriously fragile. Even if it charges your phone, it might not transfer data reliably. Here's what to do:

1. Unplug everything. Check both ends of your cable for bent pins or discoloration.
2. Use the cable that came with your iPhone, or a new Apple-certified one. Knockoff cables cause 4013 more than you'd think.
3. Plug the cable directly into a USB port on your computer's back (if desktop) or the main port on a laptop. Skip hubs and front ports.
4. Try a USB 2.0 port instead of USB 3.0. Some Windows users report 4013 only on USB 3.0 ports.
5. Retry the restore. If it works, great. If not, move to the next fix.

Fix 2: Restart Both Devices (Yes, Both)

This clears temporary glitches that can mess with the restore. It's not a cure-all, but it's fast.

1. Restart your computer (full shutdown, not just sleep).
2. Force-restart your iPhone: press and release Volume Up, then Volume Down, then hold the side button until you see the Apple logo.
3. Put your iPhone back into recovery mode and try the restore again.

Fix 3: Update (or Reinstall) Apple Mobile Device USB Driver on Windows

If you're on a Mac, skip this. On Windows 10 or 11, the driver can get corrupted after a Windows update. This is my number one fix for 4013 on PCs.

1. Right-click the Start button and open Device Manager.
2. Expand Universal Serial Bus controllers.
3. Look for Apple Mobile Device USB Driver. If you see a yellow triangle, that's your problem.
4. Right-click it and choose Update driver → Search automatically for drivers.
5. If that doesn't work, right-click and choose Uninstall device. Check the box that says "Delete the driver software for this device" if it appears.
6. Restart your PC. Windows will reinstall the driver automatically.
7. Plug in your iPhone and try the restore again.

If Windows won't find a new driver, you can force it manually. Download the latest iTunes installer from Apple's website (even if you use the Store version), run it, and select Repair. This reinstalls all the USB components.

Fix 4: Use a Different Computer

If you're stuck, borrow a friend's Mac or PC. This isolates whether the problem is your computer or your phone. I've seen cases where a corporate laptop has weird security software blocking the restore. A different machine often just works.

Fix 5: Try Third-Party Software (As a Last Resort)

I'm not a fan of pay-to-play tools, but if you've tried everything and the phone still fails, tools like ReiBoot or iMyFone Fixppo can sometimes bypass the error. They're not magic – they do the same thing as iTunes but with different error handling. Only use these if you're comfortable with risk. They're a last resort, not a first step.

What If It Still Fails?

If you've done all the above and error 4013 persists, you're likely dealing with a hardware issue. The restore is failing because the iPhone's storage or logic board is damaged. Before you give up, check one more thing: your iPhone's storage. If it was nearly full, the restore might fail because there's not enough free space to write the new firmware. But that's rare.

Try one more thing: put your iPhone in recovery mode and restore via a computer that's running macOS Finder (if you have access to one). If it still fails, your next step is Apple Support. Book an appointment at a Genius Bar. They can run diagnostics that go deeper than what you can do at home. Sometimes it's a repair, sometimes it's a replacement. But you'll know for sure.

Pro tip: If you're using Windows, make sure iTunes is up to date. The Store version and the standalone version can behave differently. When in doubt, use the standalone version from Apple's site.

Error 4013 is annoying, but it's fixable in most cases. Start with the cable, then the drivers, then the computer. You'll save yourself an hour of frustration.