from Amazon, or check out the Add Recent/Favorite Items Stack to Dock | November 22, 2007
You can add a very useful stack to your dock that can display a variety of you recent or favorite items. Do do this simply enter the following commands in the terminal:
defaults write com.apple.dock persistent-others -array-add '{ "tile-data" = { "list-type" = 1; }; "tile-type" = "recents-tile"; }'
killall Dock
You can then select what items you want this item to display from the stacks contextual menu.
Personally I like to leave it on “Favorite Items” which correspond to the user selectable locations under “PLACES” in the Finders side bar.
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