Apple Error 4013 — Causes & Fix
On Apple devices, Error 4013 means the iPhone could not be restored or updated because the connection to the computer was lost mid-process — often a cable/USB or hardware issue.
- Applies to
- Apple devices
- Time to fix
- 10–45 minutes
What it means
Causes include a faulty USB cable/port, an interrupted connection, outdated iTunes/Finder, or in some cases a hardware fault. This is a Apple error; if it persists, Apple's official support has device-specific steps.
Symptoms
- "The iPhone could not be restored. An unknown error occurred (4013)."
- Restore/update stops partway
How to fix it
- 1
Use a good cable/port and update software
1. Use a genuine Apple cable and a different USB port (ideally directly on the computer). 2. Update iTunes/macOS to the latest version, then retry.
- 2
Force restart and retry / DFU
1. Force-restart the iPhone and try again. 2. If it persists, restore in DFU mode; a hardware issue may need Apple service.
Frequently asked questions
Is error 4013 a hardware problem?
Often it's the cable/port or software, so try a genuine cable, another port, and updated iTunes first. If those don't help, it can indicate a hardware fault needing service.
Last updated July 20, 2026
Guidance only — always consult a qualified professional or the official service manual before carrying out repairs.