If I type this command into the terminal, it works perfectly. Code: find ./ ! -name '*.download' | xargs -I trp cp -pf trp /Users/Todd/Downloads/trp 2>/dev/null I added it to an AppleScript, and attached it to folder action script, and for some reason it doesn't work, and freezes Finder for a while when it tries to execute. Here is the apple script: Code: on adding folder items to this_folder after receiving added_items tell application "Finder" do shell script "find ./ ! -name '*.download' | xargs -I trp cp -pf trp /Users/Todd/Downloads/trp 2>/dev/null" end tell end adding folder items to Any reason why this apple script shouldn't work, and why it is freezing Finder?