This topic is part of Working with droplets, which covers the whole subject on one page.

You can prevent changes to a droplet by opening it in edit mode and ticking the Prevent droplet editing option in the General tab of the Settings… window (see Editing Droplets).

System Administrators Only: Once locked a droplet cannot be unlocked unless you manually edit the Root/Host Application Settings/global settings/lockedDroplet property in the Settings.plist file inside the Resources folder of the droplet bundle.

Try it on your own files

The free trial renames up to 10 files at a time, with no time limit. Version 12.36 for macOS 15 Sequoia and later, Intel and Apple Silicon. Older macOS versions