I need to change the folder icons of a selected folder and all the subfolder inside it with the same PNG image.
Accept any mode (Bash scripts, Automator workflows and so on...), I have no preferences.
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Sign up to join this communityThis is a solution using the macOS GUI:
kind:folder
Let me know if this works for you.
Sometimes you have to click twice on the icon in the Inspector window in order to paste the image successfully.