Open folder with Mac icons in .ICNS format in Finder and copy icon (Cmd+C).
![]()
Select Application or Folder. Right-click to get Info (Cmd+I) and select the application icon in the top left corner of the window.
![]()
Paste new icon (Cmd+V).
![]()
To revert default icon, select icon in the top left corner of info window and delete it (Backspace).
See also how to change the new iTunes 10 icon.

