How to Fix ‘Dyld: Library not Loaded’ Error on MacOS

MacOS developed and distributed by Apple is surely one of the most reliable Operating System out there. It is used mostly by professionals who intend to use their computers for business purposes. However, quite recently a lot of reports have been coming in of a “Dyld: Library Not Loaded” Error on MacOS. In this article, we will discuss the reason due to which this error is triggered and also provide viable solutions in order to fix them.

“dyld: Library not Loaded” Error Message on MacOS

What Causes the “Dyld: Library Not Loaded” Error on MacOS?

After receiving numerous reports, we decided to investigate the issue and identified the reason due to which this error is triggered.

  • Invalid Location: This error is triggered when the computer tries to find the “libmysqlclient.18.dylib” file or a file similar to that under the “usr/lib” location. The file is quite obviously not present in this location due to which the error is triggered.

Now that you have a basic understanding of the nature of the problem we will move on towards the solutions. Make sure to implement these in the specific order in which they are provided to avoid any conflicts.

Solution 1: Creating a Symbolic Link

It is possible to counter the problem by creating a Symbolic Link in the directory where the computer is checking for the “.dylib” file. In order to do that:

  1. Navigate to the “/usr/lib” folder.
  2. Press the “Command” + “Space” simultaneously.
  3. Type in “Terminal” and press “Enter“.
    MacOS Terminal
  4. Type the following command in the terminal and press “Enter
    sudo ln -s /path/to/your/libmysqlclient.18.dylib /usr/lib/libmysqlclient.18.dylib

    An example of the above command looks like this:

    sudo ln -s /usr/local/mysql/lib/libmysqlclient.18.dylib /usr/lib/libmysqlclient.18.dylib
  5. Check to see if the issue persists.

Solution 2: Updating Brew

In some cases, this file is missing from the directory due to an outdated installation of “Brew”. Therefore, in this step, we will be updating Brew. In order to do that:

  1. Press the “Command” + “Space” simultaneously.
  2. Type in “Terminal” and pressEnter“.
    MacOS Terminal
  3. Type in the following command in the terminal and press “Enter“.
    brew update
  4. Again, type in the following command in the terminal and press “Enter”.
    brew upgrade
  5. Check to see if the issue persists.

Solution 3: Running a “Copy_dylibs.py” Script

In some cases, the references for the “.dylib” files aren’t correct due to which this error is triggered. Therefore, in this step, we will be running a script which will automatically detect and fix these issues. In order to do that:

  1. Click on this link and download the script.
  2. Extract the contents of the “.zip” file.
    Contents of the zip file
  3. Read the “readme” included in the “.zip” file carefully for detailed instructions.
  4. Run the “copy_dylibs.py” script and let it fix the issue
  5. Check to see if the issue persists.

Kevin Arrows


Kevin is a dynamic and self-motivated information technology professional, with a Thorough knowledge of all facets pertaining to network infrastructure design, implementation and administration. Superior record of delivering simultaneous large-scale mission critical projects on time and under budget.

Expert Tip

How to Fix ‘Dyld: Library not Loaded’ Error on MacOS

If the issue is with your Computer or a Laptop you should try using Reimage Plus which can scan the repositories and replace corrupt and missing files. This works in most cases, where the issue is originated due to a system corruption. You can download Reimage by clicking the Download button below.

Download Now

I'm not interested

Close