Error 9: Try Updating Your Device Again
Apple's current guidance for this error is to simply try the update or restore again. It can occur when the device loses communication with the computer mid-process, or when third-party security software interferes with the connection.
- • On Mac with macOS Catalina 10.15 or later: Ensure your Mac is up to date
- • On Mac with macOS Mojave 10.14 or earlier: Ensure you have the latest version of iTunes
- • On PC: Ensure you have the latest version of iTunes or the Apple Devices app
- 1 Do not disconnect your device during the update process
- 2 Backup your data before attempting a restore
- 1 Communication interrupted during the update or restore process
- 2 Third-party security software interfering with the connection
- 3 USB connection became unstable
- 4 Device entering recovery mode unexpectedly
Understanding Error 9
Error 9 occurs when communication between your device and the computer is interrupted during an update or restore. Apple’s current guidance for this error is simply to try the update again first. It is closely related to Errors 4005 and 4013, which share similar causes and steps.
Step-by-Step Troubleshooting
1. Try the Update Again
Apple’s first recommendation for Error 9 is to attempt the update again before deeper troubleshooting. A retry frequently succeeds, especially after a connection hiccup.
2. Force Restart Your Device
A force restart can resolve temporary communication issues without erasing data:
- iPhone 8 or later: Press and quickly release Volume Up, then Volume Down, then press and hold the Side button until the Apple logo appears
- iPhone 7 series: Press and hold Volume Down + Side button together for at least 10 seconds
- iPhone 6s or earlier: Press and hold Home + Top (or Side) button together for at least 10 seconds
3. Secure the USB Connection
Since Error 9 can involve an interrupted connection, make sure the link is stable:
- Use an original Apple USB cable - third-party cables can cause intermittent disconnections
- Plug directly into the computer - avoid USB hubs, keyboards, or monitors
- Don’t move the device during the restore process
- Check both the cable connector and the device’s Lightning/USB-C port for debris
4. Check Security Software
Third-party security software can interfere with the connection to Apple’s servers:
- Temporarily disable antivirus or firewall software to test
- Add iTunes or Finder to the software’s exception list instead of leaving protection off permanently
5. Update Instead of Restore
When prompted after an error, choose Update instead of Restore. This reinstalls iOS without erasing your data. Only choose Restore if Update fails repeatedly.
6. Try Recovery Mode
If the device is stuck after Error 9, put it into recovery mode and try again:
- Connect the device to your computer
- Open iTunes or Finder
- Enter recovery mode using the correct button combination for your model
- When prompted, choose Update first
7. Try a Different Computer
Restoring on a different computer can help rule out USB port or software issues on your current machine.
Prevention Tips
- Keep your computer’s OS and iTunes/Finder updated
- Avoid using your computer for other tasks during a restore
- Ensure your device has adequate battery charge (at least 50%) before starting
Related Articles
Related Errors
If you've tried all the steps above and still can't resolve the issue, you may need to contact Apple Support or visit an Apple Store. You can also compare your case against Apple's official iOS update and restore errors page.