Is there any tutorials or references, if such thing is possible, to make GUI applications out of command line apps?
What I mean is, having a command line app, wrap it into an app bundle and create a Cocoa GUI app that would have a simple interface to execute the command line app with its flags and parameters.
Today, most vendors offer the graphical user interface (GUI) as the default for operating systems (OSes) such as Windows, Linux and macOS. Most current Unix-based systems offer both a command-line interface and a graphical user interface.
To open it, either open your Applications folder, then open Utilities and double-click on Terminal, or press Command-space to launch Spotlight and type "Terminal," then double-click the search result.
The command line interface is a program on your computer that allows you to create and delete files, run programs, and navigate through folders and files. On a Mac, it's called Terminal, and on Windows, it's Command Prompt.
As a matter of fact there are. Here is the first hit for a Google search:
What you're looking for is the NSTask
class. Check out the documentation for all the information you need.
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