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In Terminal you can write the defaults write com.apple.Finder AppleShowAllFiles and press Enter.
The next step is to restart the Finder by holding down Option while clicking the Finder icon in the Dock and holding. Drag down to Relaunch.
To reverse the process, use NO instead of YES in the Terminal command, then relaunch the Finder.
You can find hidden file easily on mac. Just following the instructin has given here.