How to use this box with Vagrant:

Vagrant.configure("2") do |config|
  config.vm.box = "vagrant-appunite/macos10.13-xcode9.0.1"
  config.vm.box_version = "1.0.0"
end

vagrant init vagrant-appunite/macos10.13-xcode9.0.1 \
  --box-version 1.0.0
vagrant up

This version was created almost 7 years ago.

macOS 10.13 with Xcode 9.0.1

This is a box of macOS 10.13 which include:

1 provider for this version.

virtualbox
unknown	Hosted by Vagrant Cloud (21.3 GB)

vagrant-appunite/macos10.13-xcode9.0.1 Vagrant box