Error 4005High severityMedium to fix
Apple Error 4005 — Causes & Fix
On Apple devices, Error 4005 means the restore failed due to a connection interruption — in the same family as 4013/4014.
- Applies to
- Apple devices
- Time to fix
- 10–45 minutes
What it means
Causes include a faulty cable/port, an unstable connection, or outdated software. This is a Apple error; if it persists, Apple's official support has device-specific steps.
Symptoms
- "...unknown error (4005)."
- Restore interrupted
How to fix it
- 1
Genuine cable + updated software
1. Use a genuine cable and a good USB port; update iTunes/Finder.
- 2
DFU restore
1. Retry in DFU mode; persistent failures may indicate hardware.
Frequently asked questions
Is 4005 fixable at home?
Often yes — swap to a genuine cable and port, update software, and try a DFU restore. If it keeps failing, the hardware may need service.
Last updated July 20, 2026
Guidance only — always consult a qualified professional or the official service manual before carrying out repairs.