By default, Finder hides some files and if you need it, you can set Finder to show all files including hidden.

To Set Finder to Show All Files

1. Open Terminal (Mac HDD -> Applications -> Utilities -> Terminal)

1. Execute Command

defaults write com.apple.finder AppleShowAllFiles 1 && killall Finder

To Set Finder to Default Setting

1. Open Terminal (Mac HDDApplications -> Utilities -> Terminal)

1. Execute Command

defaults write com.apple.finder AppleShowAllFiles 0 && killall Finder