This is for Mountain Lion.

http://www.fixkb.com/2011/08/reset-home-folder-permissions.html

  1. In Terminal, type sudo bash and press Enter.
  2. You will need to enter your password and press Enter.
    • It won’t show any characters when you type.
    • If you do not have a password then set one first.
  3. Type in the following (case-sensitive), pressing Enter at the end of each line.
    Replace “username” with the name of your home folder.
    sudo chmod -R -v -N ~
    sudo chown -R username:staff ~
    sudo chmod -R -v 700 ~
    sudo chmod -v 755 ~
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