Obtain Terminal Window Reference

That’s not how the usual command-line app running on a dumb terminal—or running on a somewhat smarter emulation of a dumb terminal—typically works.

Most such apps use either output text directly, or will wrap text with ANSI escape sequences for graphics and positioning.

You’re closer to designing a GUI app design, here.

I’ve seen a few terminal frameworks that simulated subwindows within a larger terminal window, but those are pretty rare nowadays. The C ncurses library can do that, and there are others. I don’t know of a Swift framework (whether from Apple or from a third-party provider) that does that, but there might be one.

Input parsing is usually with getopt or getopt_long from C or Swift command line frameworks (some info, more), or a text parser. Ragel, for instance. It’s possible to do a GUI-like input with ncurses or such, but thar;s lretty rare these days.

So… What are you up to here?

Please post what you want to do, then maybe referencing some other-platform API to elaborate on the goal for those already familiar with that platform. (Providing a description solely referencing a Windows API isn’t all that helpful for many of us, as now I have to go look up what that API does, and then try to guess what you’re up to from reading Windows docs for this unfamiliar-to-me and apparently also not-on-the-roadmap Windows API.)

If you want to log some chatter, NSLog is an option.

In a normal case for a macOS command-line tool, the C (and ObjC) stdout stream (“I/O channel”) is the usual output path.

Are you possibly also using .NET or Flutter or some other framework here, in addition to ObjC?