
How does the Finder know the right app to open a file with? Or QuickLook how to preview its contents? Or other services like Spotlight know how to …
How does macOS tell the type of a file?


How does the Finder know the right app to open a file with? Or QuickLook how to preview its contents? Or other services like Spotlight know how to …
How does macOS tell the type of a file?
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