How to make Finder show hidden files and folders
Step 1: Open the "Terminal" application.
Step 2: Enter the following command:
defaults write com.apple.finder AppleShowAllFiles -boolean true ; killall Finder
Step 3: Press Enter
Now you will see those hidden files and folders in the Finder window.
If you want to hide the original hidden files and folders again, replace the above command with
defaults write com.apple.finder AppleShowAllFiles -boolean false ; killall Finder
Just press Enter, hidden files will no longer be displayed