Show Hidden Files in Mac

The long way...
1. In Terminal:

defaults write com.apple.finder AppleShowAllFiles YES

2. Press return

3. Holt alt key on keyboard, right click, relaunch

4. To hide:

defaults write com.apple.finder AppleShowAllFiles NO

Making aliases for show and hide hidden files

1. In Terminal:

sudo nano ~/.bash_profile

2. Enter your root password, and hit return

3. Paste the following in open .bash_profile file:

alias showFiles='defaults write com.apple.finder AppleShowAllFiles YES; killall Finder /System/Library/CoreServices/Finder.app'hit return

4. Paste the following:

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

5. Ctrl+O and hit return to save file

6. Ctrl+X to exit

So the next time, you can just use the aliases in Terminal, showFiles to show hidden files, and hideFiles to hide them.