How to Fix iTunes/iPhone Error 4037 |7 Ways Guide

by Sophie Green   Updated on 2021-01-26 / Update for  iTunes Tips

4037 error? What does the error code 4037 mean?

Many users have reported that they encounter iTunes error 4037 while trying to connect iPhone to iTunes (computer). Given this irritating error blocks the connection between your mobile and iTunes and delays your tasks, it warrants immediate troubleshooting.

We have done a comprehensive research on this topic and come up with various workarounds to fix this issue.

Apple Answered: What Does the Error Code 4037 Mean

If you’re facing the error 4037 iPhone, it means that iTunes is unable to update or restore your iPhone – most probably because your iPhone is passcode locked.

It’s worth mentioning that any software glitch in your iPhone or iTunes can also hinder the normal functioning of iTunes and prompt error 4037.

7 Ways to Fix Apple Error 4037

Regardless of what reasons may have caused apple error 4037, the below tips will help you

Way 1: Unlock Your Device to Fix Error 4037

As per Apple’s answer, users have to unlock their iPhones/iPads to be able to connect to iTunes. As long as your iPhone's screen is locked, iTunes won’t connect to it and it might be reason why you’re facing Error 4037.

Way 2: Restart iPhone and iTunes to Fix Error 4037

Restarting your iPhone is one simple method to fix iTunes error 4037. It removes any bug or glitch on your iPhone that may have interrupted its connection its iTunes.

Whenever you face any software-related problem in your device, the first thing you do is restart it and more often than none, it resolves the issue.

restart iphone

Way 3: Make Sure A Stable Computer Network

Make sure your computer has an active internet connection while restoring your iPhone as a weaker connection may interrupt the Update or Restoring process and cause several errors.

You can open the Web Browser to confirm if your internet connection is working normally. If not, then connect to another Wi-Fi connection to get rid of error code 4037 iTunes.

Way 4: Check USB Connection

It may occur that the USB port of your computer or the lightning cable is damaged or malfunctioning. These hardware issues can also trigger iPhone error 4037.

You should change the lightning cable and/or switch USB ports to confirm whether the issue at hand is due to faulty USB connection. We recommend you to always use original lightning cable to connect your iPhone to the computer.

Way 5: Turn off Security Software

Many a time, an Antivirus software installed in your computer detects and blocks any unauthenticated connection with third-party devices – as a security measure. This may be the case here too.

You need to confirm if your Software is blocking the connection between iTunes and Apple Servers on your iPhone. As a quick fix of apple error 4037, you should Disable or Turn Off the security feature of your Antivirus Software or Windows Protection Program for a few minutes.

Way 6: Check the Host File

Your computer uses specific Host File connect to Apple Servers. Any issues in this file can affect the working of iTunes and cause 4037 error code iTunes while trying it to connect with your iPhone. You need to check if there are any issues with the Host File:

On Mac

  • Open Finder and go to Applications > Utilities.
  • Launch Terminal and type “nano /private/etc/hosts” command and hit Return and you’ll see the Host File.
  • Now, use arrow keys to navigate to “ If an entry named “” is present, then Host File is having any issue.

To troubleshoot it:

  • Add # symbol + Space before entry and press Ctrl + O to save it.
  • Then, hit on Return and Ctrl +X to leave the Terminal and then restart your Mac.

Windows users can use Microsoft Support to restore the Host File back to default. Select your OS and follow the on-screen steps.

Way 7: Update iTunes to Fix Error 4037 iPhone

If you are using an older version of iTunes, then it is time to update it to the latest version. Updating it automatically removes many bugs and system issues. Follow the below steps to update iTunes:

If you’re using Mac

  • Launch iTunes and click on iTunes option on the Top bar. Then, hit on Check for Updates.
  • Follow the on-screen instructions to install the latest version.

If you’re using Windows:

  • Launch iTunes and go to the Help section on the Top Menu.
  • Hit on Check for Updates and follow the on-screen step-by-step procedure to install the latest version.

High Success Rate: Fix iTunes Error 4037 with Tenorshare ReiBoot

If you don’t want to get exhausted by implementing the aforementioned methods and want a direct and quicker method to fix iTunes error 4037 permanently, then we recommend you to use Tenorshare ReiBoot. This tool is designed to diagnose and repair the root causes of over 150+ IOS bugs in your iPhone.

In just a few minutes, you can bring your iPhone back to normal using this powerful software. To repair your iPhone using ReiBoot, follow the below steps:

  • Run ReiBoot on your computer and connect your iPhone to it. When the software detects it, hit on 'Start'.

    iPhone error 4037 – fix now
  • You’ll enter a new interface where you need to click on Standard Repair to enter the Firmware Download interface.

    apple error 4037 – fix now
  • Here, verify your mobile’s model and other details and hit on Download to save the Firmware Package on your computer.

    unknown error 4037 when trying to update iPhone - firmware
  • Depending on your Internet speed, ReiBoot will take some time to download the Firmware file. When it’s downloaded, hit on Start Standard Repair.

    4037 error code iTunes - downloading
  • ReiBoot will start a deep scan of your iPhone and within a few minutes, it will completely repair your phone. Hit on Done when the process is completed and you won’t face error 4037 while connecting your device to iTunes.

    iPhone error 4037 - completed


iTunes/iPhone error 4037 is still a less discussed issue in Apple community as exact reasons of why this issue appears are still not clear. Nonetheless, we have outlined 8 user-proven ways of troubleshooting this error.

Any of the method can get the job done for you but I recommend you to install Tenorshare ReiBoot if you to address the root causes of this issue once and for all.