How To Fix Python Error Certificate Verify Failed: Unable To Get Local Issuer Certificate In Mac OS

When I run python code in mac os, I meet a certificate verify failed error like this ssl.SSLCertVerificationError: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: unable to get local issuer certificate (_ssl.c:1056). This error confused me a lot of time. And after googling the error, I finally find the solution to fix it, below are the steps.

1. Fix Certificate Verify Failed: Unable To Get Local Issuer Certificate Error Steps.

  1. Open mac os finder, then click Applications —> Python 3.7 folder to expand it. Your python may have a different version. You can find the Install Certificates.command program in the Python 3.7 folder.
    macos-finder-applications-python3.7-Install-Certificates-command
  2. Double click the Install Certificates.command file to run it. It will open another popup terminal window and show below command execution output text.
    Last login: Mon Jun 24 15:53:52 on ttys002
    /Applications/Python\ 3.7/Install\ Certificates.command ; exit;
    songs-MacBook-Pro:~ songzhao$ /Applications/Python\ 3.7/Install\ Certificates.command ; exit;
     -- pip install --upgrade certifi
    Requirement already up-to-date: certifi in /Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages (2019.6.16)
     -- removing any existing file or link
     -- creating symlink to certifi certificate bundle
     -- setting permissions
     -- update complete
    logout
    Saving session...
    ...copying shared history...
    ...saving history...truncating history files...
    ...completed.
    
    [Process completed]
    
    
    
  3. Close the popup window when the command runs completely successfully. Now run the python code again, the Certificate Verify Failed Error will disappear.
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Sriram
Sriram

How to fix a similar thing on a windows machine? I am trying to install some packages and it’s giving me the same error.

Jackie Li
Jackie Li

My python script use urllib.request package to retrieve a CSV file from a website. And I run the script on macOS Mojave with Python 3.7.

The CSV file can be retrieved by both HTTPS and HTTP protocol URL, and when I use HTTPS protocol URL, this error occurred. And when I use HTTP protocol URL the error disappear.

I know the HTTP protocol does not check the SSL certificate, maybe this avoid the error occurred with HTTPS protocol. So I found this article and the solution can fix my problem.

But I do not know why it behaves different between HTTP and HTTPS protocol. I really want to find what does the Install\ Certificates.command program do at the back-end when I run it.

Can anybody give me an answer? Thanks a lot.

Nickie
Nickie

Thank you so much for this easy yet super helpful fix.

bank
bank

oh my god such a simple fix for such a complicated error message! XD your guide really helped a lot. thank you so much!

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