Fixing the 'Library Not Loaded' Error for libreadline.6.dylib on Mac: Step-by-Step Guide

Title: Fixing the 'Library Not Loaded' Error for libreadline.6.dylib on Mac: Step-by-Step Guide
Keywords: library not loaded, libreadline.6.dylib, Mac, error, fix
Description: A step-by-step guide on how to fix the 'Library Not Loaded' error for libreadline.6.dylib on Mac.


If you're a developer working on a Mac, you may have encountered the "Library not loaded" error for `libreadline.6.dylib`. This error can be frustrating, but fortunately, it's easy to fix. In this guide, we'll walk you through the steps to resolve this error and get your development environment back up and running.

## Table of Contents

1. [Understanding the Error](#understanding-the-error)
2. [Step-by-Step Guide to Fix the Error](#step-by-step-guide-to-fix-the-error)
3. [FAQs](#faqs)
4. [Related Links](#related-links)

## Understanding the Error

The `libreadline.6.dylib` library is part of the [Readline library](, which is a set of functions that provide command-line editing and history capabilities for interactive programs. This library is widely used in various programming languages and command-line tools.

The "Library not loaded" error occurs when the `libreadline.6.dylib` library is missing from your system or the path to the library is incorrect. This can happen due to various reasons, such as a system upgrade, installation of a new package, or accidental deletion of the library file.

## Step-by-Step Guide to Fix the Error

### Step 1: Check if the library is installed

First, check if the `libreadline.6.dylib` library is installed on your system. You can do this by running the following command in your terminal:

find /usr/local/opt/readline -name libreadline.6.dylib

If the library is installed, the command will return the path to the library file. If not, proceed to Step 2.

Step 2: Install the library using Homebrew

If the library is missing, you can easily install it using Homebrew, a package manager for macOS. If you don't have Homebrew installed, follow the instructions on their official website to install it.

Once Homebrew is installed, run the following command to install the readline library:

brew install readline

After the installation is complete, you should now have the libreadline.6.dylib library on your system.

Now that the library is installed, you need to create a symbolic link to the library file to fix the "Library not loaded" error. Run the following command in your terminal:

ln -s /usr/local/opt/readline/lib/libreadline.6.dylib /usr/local/lib/libreadline.6.dylib

This command creates a symbolic link from the installed library to the /usr/local/lib directory, which is a common location for shared libraries on macOS.

Step 4: Verify the fix

To verify that the error is fixed, run the command or program that previously threw the "Library not loaded" error. If everything is set up correctly, you should no longer see the error.


A symbolic link, also known as a symlink, is a file that points to another file or directory. It's similar to a shortcut in Windows. Symbolic links are used to create references to files or directories without having to duplicate the actual data.

2. Can I use another package manager to install the library?

Yes, you can use other package managers like MacPorts or Fink to install the readline library. However, Homebrew is the most popular and widely used package manager on macOS.

3. What should I do if the error persists?

If the error persists even after following the steps in this guide, it's possible that your system has other issues or conflicts. You can try reinstalling the affected program or package, or reach out to the program's support for further assistance.

4. Can this error occur on other operating systems?

Yes, this error can occur on other operating systems like Linux and Windows. The steps to fix the error may be different depending on the operating system and package manager used.

Creating symbolic links is generally safe, as long as you're pointing to the correct target file or directory. However, be cautious when creating or modifying symbolic links, as incorrect links can cause errors or unexpected behavior in your system.


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