Just like when using Windows, sometimes it is necessary to make special hidden system files visible to Finder. There is no preference for it, but with a simple Terminal command, things can be made visible very easily, on a privileged user account.
Simply open the ‘Terminal’ application, and at the prompt, type:
defaults write com.apple.finder AppleShowAllFiles TRUE
This will cause all Finder windows to close and then reopen with the hidden files, visible and identifiable with a ghost-like appearance. You should be able to interact with them normally now.