How can I make a file un-hidden permanently? I have some files that were hidden on a PC. Now they live on my Mac. How can I remove the hidden property on each of these files?
In Terminal defaults write com.apple.finder AppleShowAllFiles TRUE, relaunch  Finder. After that you'll see all your hidden files in Finder. 

Now type 

chflags nohidden


into Terminal and just drag&amp;drop file that you want to unhide on the line. Enter.

defaults write com.apple.finder AppleShowAllFiles FALSE will reverse Finder back to normal.