Fix Verifying [file name] message in macOS Big Sur

When i tried to play a mp4 video file on VLC using the Open with option, I encountered a pop-up message with Verifying Video file name and it din’t finish for a long time. This was happening on both my MacBook Pro and my iMac as well.

This verifying message with progress bar started occurring after i have updated to the latest high sierra version of macOs. If we skip the file verification, the video will not be played. And this verifying progress bar occurs sometimes on every type of file.

After verifying it will show a error message as well like ““testing.mp4” cannot be opened because it is from an unidentified developer.” macOS cannot verify that this app is free from malware.

So i used Apple Quicktime player and it worked flawlessly without the file verification pop up message. But i wanted to use VLC media player so i wanted to fix this issue and found the solution which I’m going to share in this post.

This verification also happens when you extract large files in macOS high sierra and also in Big sure.

How To Skip Verifying File name Message in MacOS

  1. If you are trying to play a video in VLC, simply open the VLC media player application directly.
  2. Once it’s open, now go to the video folder location and drag and drop the file into the VLC player window.
  3. Now the Video will play without any file verification.

If you wanted to disable verification altogether, then you can use a Terminal Command to disable it.

  1. Open Terminal window
  2. Now type the code “defaults write LSQuarantine -bool NO” and press enter key.
  3. Now restart your Mac and try playing the video again directly.
  4. The File verification window won’t appear again.

I hope you have successfully fixed the File Verification error on macos when playing video or when extracting a large file.

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