Platypus allows creating applications from scripts. This way, you can give command-line scripts a graphical interface to facilitate user interaction with them, which comes in quite handy when you are creating installers, launchers and droplets, for instance. The tool works by wrapping the desired scripts into a bundle that also includes a binary file, so that they can be executed just like a standard application.
Other possibilities include bundling the desired files, which you can easily drag and drop onto the app’s window. Besides, it is allowed to run the future application with root privileges via the macOS Security Framework or in the background. Likewise, you can set the app to remain running after its execution. Although it worked perfectly for me, some users have complained about the program using the wrong path when they use the drag-and-drop function to add files to the bundle. more