Me encontré con un AppleScript que hace algo similar a lo que @bmike ha sugerido. El usuario Jolly Jimmy aparece en un mensaje en el foro :
tell application "Finder"
set theSelection to selection
if theSelection is {} then
beep
activate current application
display alert "No files are selected for deletion." message "Select one or more files to delete." as warning
else
activate current application
display alert "Delete item(s)?" message "The selected item(s) will be deleted immediately. Are you sure you want to continue?" buttons {"OK", "Cancel"} as warning
set buttonpressed to button returned of result
if the buttonpressed is "OK" then
repeat with i from 1 to (count theSelection)
set item1 to (the quoted form of POSIX path of (item i of the theSelection as alias))
set deleteit to "rm -rf " & item1 & ""
try
do shell script deleteit
on error
do shell script deleteit with administrator privileges
end try
end repeat
end if
end if
end tell
Añade este script al menú de servicios, y deberías poder eliminarlo haciendo clic con el botón derecho.