How to Fix iTunes Error 4014 When Updating iPhone

By ErrorFix · Updated October 17, 2026 · 8 min read

What Error 4014 means

The full message reads "The iPhone could not be updated/restored. An unknown error occurred (4014)." It shows up when you update or restore an iPhone through a computer: the software starts transferring, something interrupts it, and the whole process aborts. The iPhone is left wherever it was when things broke — usually still on the old iOS version, sometimes stuck on the recovery-mode screen with the cable icon, waiting for another attempt.

Error 4014 belongs to Apple's family of restore and update errors, alongside 4005 and 4013. In most cases the culprit sits on the computer side of the connection: an outdated iTunes, a flaky USB link, or security software quietly blocking the restore traffic. Less commonly — and this is what gives 4014 its reputation — the phone itself has a hardware fault, historically tied to storage problems after drops or heat damage. The fixes below are ordered to rule out the cheap, common causes first and end with the hardware verdict only when everything else has been eliminated.

Common causes

• Faulty or intermittent USB connection: a frayed cable, dirty connector pins, or a USB hub between the iPhone and the computer causes tiny disconnects during the long firmware transfer. Restore traffic is unforgiving — one dropped packet too many and the whole update aborts with 4014.
• Outdated iTunes, Finder, or Apple Devices app: a newer iPhone running newer iOS talking to an old version of Apple's computer software is a classic mismatch. Apple updates the restore protocols over time, and old tools simply cannot complete the handshake.
• Security software blocking the restore: antivirus suites, third-party firewalls, and VPNs can intercept or block the communication between iTunes and Apple's servers during a restore. The restore sees its connection die and reports 4014.
• Corrupted Apple Mobile Device drivers on Windows: Windows PCs talk to iPhones through Apple's drivers, and when those drivers corrupt or conflict with a Windows update, the phone appears in Device Manager with an error symbol and restores fail.
• Hardware failure on the iPhone: when every computer-side cause is ruled out and 4014 persists, the fault is on the device — most often storage or memory problems. This is more likely if the phone has been dropped, overheated, or has a history of sudden reboots and freezing.

How to fix Error 4014 — step by step

Work through these in order. Each step removes one real cause, and the first four solve the large majority of cases.

1. Update iTunes, Finder, or the Apple Devices app. On a Mac, click the Apple menu, then System Settings, then General, then Software Update, and install everything available — Finder updates ship with macOS. On a Windows PC, open the Microsoft Store, go to Downloads and updates, and update iTunes or the Apple Devices app to the latest version. An out-of-date computer-side tool talking to a newer iPhone is one of the most common triggers for error 4014, so do this before anything else.
2. Switch to an Apple-certified cable and a different USB port. Unplug the iPhone and inspect the cable: fraying near the connectors or dirt on the Lightning or USB-C pins causes the intermittent disconnects that error 4014 feeds on. Use an original Apple cable or a certified third-party cable, and plug it into a USB port directly on the computer — not a hub. If you were on a front-panel or hub port, move to a rear motherboard port. Retry the update or restore after the swap.
3. Restart the iPhone and the computer. Restart both ends of the connection. On the iPhone, press and hold the Side button and either Volume button, drag the power-off slider, wait 30 seconds, then power it back on. On the computer, do a full restart rather than just waking it from sleep. Reconnect the iPhone, open iTunes, Finder, or the Apple Devices app, and try the update again. A restart clears hung Apple Mobile Device services on the computer and stuck update processes on the phone.
4. Temporarily turn off security software. Antivirus suites and third-party firewalls on Windows can block the communication between iTunes and Apple's servers that happens during a restore, and error 4014 is a common result. Open your security software and disable real-time protection and the firewall for the duration of the update — on Windows you can also open Windows Security, then Virus & threat protection, then Manage settings, and toggle off real-time protection. Also disable any VPN, since restore traffic sometimes trips VPN filtering. Re-enable everything as soon as the update finishes.
5. Reinstall the Apple Mobile Device drivers on Windows. Keep the iPhone connected, then open Device Manager on your PC. Expand Portable Devices, right-click Apple iPhone, and choose Uninstall device, confirming the removal. Unplug the iPhone, restart the PC, plug the iPhone back in, and let Windows reinstall the driver automatically. If you downloaded iTunes directly from Apple rather than the Microsoft Store, install it from the Microsoft Store instead — its driver package is the supported one on Windows 10 and 11.
6. Restore the iPhone in recovery mode. Put the iPhone into recovery mode: quickly press and release Volume Up, quickly press and release Volume Down, then press and hold the Side button until you see the recovery-mode screen — the cable pointing to a computer icon. Do not release when the Apple logo appears; keep holding. Connect the iPhone to the computer, open iTunes, Finder, or the Apple Devices app, and you should see the option to Restore. Click Restore and let it download fresh firmware. Note that a restore erases the phone, so choose Update first if your tool offers it, and make sure you have a backup.
7. Try a different computer, then contact Apple Support. If error 4014 appears on a second computer with a good cable, the problem has followed the iPhone, not the computer — and that points at the device itself. Historically, error 4014 has been linked to storage and memory faults on the phone, especially after drops or heat exposure. Do not keep restoring repeatedly, since each failed attempt stresses the device. Back up what you can, then book an appointment at an Apple Store or contact Apple Support online: describe that 4014 persists across computers and cables, and they can run diagnostics and tell you whether a hardware repair is needed.

Did this fix it? Quick checklist

• The update or restore completes without the 4014 dialog appearing
• The iPhone boots past the Apple logo to the Hello screen or your lock screen
• Finder, iTunes, or the Apple Devices app shows the iPhone normally after syncing
• A backup restores successfully and your apps, photos, and settings are back

If the update completes but the iPhone boots with strange behavior — constant rebooting, freezing, or storage warnings — the hardware suspicion from the final step stands: get the phone checked even though the software went through. If the restore erased everything and you had no backup, your iCloud-synced items (photos, contacts, messages) still come back when you sign in with your Apple Account.