Attempting to access an older project with some hidden files I discovered I could not see them by default. I went into
Preferences..., no option. I went into
Show View Options, nothing there that helped. Turns out the solution is a bit more cumbersome.
What you need to do is open Terminal and type in:
defaults write com.apple.Finder AppleShowAllFiles YES
Make sure you restart Finder after for the change to take effect.