MacOS - Enable folder preview (X-Ray mode) in QuickLook

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To enable the QuickLook X-Ray mode under MacOS, follow the below procedure:
  • Open a terminal and type the following command:
  • defaults write com.apple.finder QLEnableXRayFolders 0

To disable this feature:
  • Open a terminal and type the following command:
  • defaults write com.apple.finder QLEnableXRayFolders 1
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