So I tried this out on macOS 26 and the `airport` command is no longer there.

There is a `airportd.sb` file, which appears to be some permissions based thing in s-expression/LISP. Weird.

Edit: Spun up a macOS 15 VM and I got this:

WARNING: The airport command line tool is deprecated and will be removed in a future release. For diagnosing Wi-Fi related issues, use the Wireless Diagnostics app or wdutil command line tool.

I guess they weren't kidding.