sudo sudo port install qemu -->>. port command not found

If you are using an Apple Silicon Mac, then consider using UTM instead which utilizes QEMU and provides a nice GUI interface. Much nicer than dealing with either Mac Ports or Homebrew and is less disruptive to macOS. Homebrew has been known to cause some configuration issues with macOS, I am not familiar with Mac Ports (always avoided it in the past since I wanted to avoid issues and I usually only use Homebrew on test systems and not my main Mac for similar reasons).

Definitely agree with @VikingOSX on using a traditional VM if this is for an Intel Mac.

The port command is installed by the MacPorts project as its package manager. Alternatively, qemu can be had via the homebrew (brew) package manager. Neither package manager is part of macOS and is installed separately.

Hi,

If you don't install brew yet, install it before qemu install.

https://brew.sh/

https://gist.github.com/Jatapiaro/6a7c769a07911adc629e1604729d4c7a

Provided you are not on an Apple Silicon (M1/M2) MacBook Pro, you might be better served installing the free VirtualBox virtual machine (e.g. 7.0.10) and installing Linux as a guest operating system. I would go this route instead of dealing with the huge dependency tree that qemu brings with it when installed by a package manager.