For those of you trying the CMD + SHIFT + Period you may need to use terminal first to refresh finders appetite. It's important that anyone attempting to do this do it just like this. As it worked for me.
First, open up Terminal and paste this. Then click Enter
defaults write com.apple.Finder AppleShowAllFiles FALSE
Second, copy or type in the next row this. Then click Enter
killall Finder
This way has pretty much always been the way but for some reason it wasn't working for me. Some will tell you all you have to do is finish with killall but that's not right. You have to add Finder with it.
After adding the last part the hidden files should appear. Then hide them again in terminal by simply pasting
defaults write com.apple.Finder AppleShowAllFiles FALSE
After that the CMD + SHIFT + . should work again.
Hope that helps some of you.