Quickly show/hide hidden files in mac osx

show-hide-files-osx

Open a terminal and paste this command

defaults write com.apple.finder AppleShowAllFiles YES

Press return and relaunch finder

To hide these files again follow the same steps replaing terminal
command with

defaults write com.apple.finder AppleShowAllFiles NO

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Alternatively you can create an alias in your bash profile
if you use these commands frequently by follwing thse steps

open ~/.bash_profile in your favorite editor
paste these two lines at the bottom and save

alias showFiles='defaults write com.apple.finder AppleShowAllFiles YES; killall Finder /System/Library/CoreServices/Finder.app'
alias hideFiles='defaults write com.apple.finder AppleShowAllFiles NO; killall Finder /System/Library/CoreServices/Finder.app'

Reload your terminal with source ~/.bash_profile to use showFiles and hideFiles to switch between the two file view modes