显示所有隐藏文件的方法：

terminal中输入：
defaults write com.apple.finder AppleShowAllFiles -bool true
同理，再次隐藏就输入：
defaults write com.apple.finder AppleShowAllFiles -bool false
 
注意：以上方法仅仅是显示，没有修改过文件的属性。要修改某个文件的隐藏属性则使用方法：
chflags nohidden filename
再次隐藏：
chflags hidden filename

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