Quick Summary
Error 14 on iPhone typically indicates a hardware or connection issue during the restore or update process. It often signifies a problem with the USB connection, the device itself, or a conflict within the system attempting the restore.
Common Causes
- Faulty USB Connection: A loose, damaged, or incompatible USB cable or port can interrupt the data transfer during the restore, leading to Error 14.
- Outdated iTunes/Finder: Using an outdated version of iTunes (on older macOS or Windows) or Finder (on newer macOS) might lack the necessary drivers or compatibility to properly communicate with the iPhone during the restore.
- Hardware Issue: A more serious hardware problem within the iPhone itself (e.g., NAND flash memory, logic board) can prevent successful restoration.
- Security Software Interference: Antivirus or firewall software on your computer may be blocking iTunes/Finder from connecting to Apple servers or properly communicating with your iPhone.
- Insufficient Storage on Computer: Lack of sufficient free disk space on the computer to unpack and process the restore files can cause restore to fail.
Step-by-Step Fixes
Method 1: Check USB Connection
Step 1: Try a different USB cable. Ensure it's an Apple-certified cable or a known good cable.
Step 2: Try a different USB port on your computer, preferably one directly on the motherboard (avoid USB hubs).
Step 3: Disconnect any other unnecessary USB devices from your computer to minimize interference.
Method 2: Update iTunes/Finder
Step 1: If you're using iTunes (Windows or older macOS), check for updates by going to Help > Check for Updates. Install any available updates.
Step 2: If you're using Finder (newer macOS), operating system updates include updates to Finder. Check for macOS updates in System Preferences > Software Update and install any available updates.
Method 3: Restart Computer and iPhone
Step 1: Restart your computer completely.
Step 2: Force restart your iPhone. The method varies depending on your iPhone model:
- iPhone 8 or later: Press and quickly release the Volume Up button, press and quickly release the Volume Down button, then press and hold the Side button until you see the Apple logo.
- iPhone 7 or 7 Plus: Press and hold both the Side (or Top) button and the Volume Down button until you see the Apple logo.
- iPhone 6s or earlier: Press and hold both the Home button and the Side (or Top) button until you see the Apple logo.
Step 3: After both devices restart, try the restore process again.
Method 4: Disable Security Software Temporarily
Step 1: Temporarily disable your antivirus and firewall software.
Step 2: Attempt the restore process again. Remember to re-enable your security software after the restore is complete.
Method 5: Free Up Disk Space
Step 1: Check your computer's available storage space. You need sufficient space, ideally more than 20GB, on the system drive where iTunes/Finder is installed.
Step 2: Delete unnecessary files and applications to free up storage space.
Method 6: DFU Restore
Important: DFU restore is a more advanced restore that erases everything on your phone. Make a backup if possible.
Step 1: Put your iPhone into DFU (Device Firmware Update) mode. The steps vary depending on your iPhone model. Search online for detailed instructions specific to your iPhone model.
Step 2: In iTunes/Finder, you should see a prompt indicating that a device in recovery mode has been detected. Choose to restore the iPhone.
Method 7: Contact Apple Support
Step 1: If none of the above steps resolve the issue, the problem may be related to hardware issues. Contact Apple Support or visit an authorized Apple service provider for further diagnosis and repair options.