Show Hidden Files: defaults write AppleShowAllFiles YES. Or in older versions you can use the Terminal commands below. So if you want to unhide hidden folders or files, just press down on CMD + Shift +. View Hidden Files using the Terminal Command-Line Interface. Go back to Terminal and type the following command. Use the Terminal method below show hidden files mac catalina reveal all the hidden files and folders youâ ve hidden, use: keyboard you. Go to ‘Finder’ and locate the folder in which your hidden files are located. How to Show or Hide Hidden Files on mac OS.Open Terminal. To reveal the files and folders that you have hidden, use chflags not hidden order instead of hidden chflags.