Viewing Hidden Files and Folders in Mac OS X

Introduction link

By default Mac OS X doesn’t show any hidden files or folders. If you want to see everything, follow these steps.

Usage link

Show all hidden objects:

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$ defaults write com.apple.Finder AppleShowAllFiles TRUE

Swap TRUE with FALSE to turn it off again. Note: Finder must be relaunched afterwards to see the effect. For example like this:

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$ killall Finder && open /System/Library/CoreServices/Finder.app