According to VMware [0]:

> You can install Mac OS X, OS X, or macOS in a virtual machine. Fusion creates the virtual machine, opens the operating system installation assistant, and installs VMware Tools. VMware Tools loads the drivers required to optimize a virtual machine's performance.

Additionally [1]:

> You can use the recovery partition on your Mac to create virtual machines running macOS.

---

[0]: https://docs.vmware.com/en/VMware-Fusion/11/com.vmware.fusio...

[1]: https://docs.vmware.com/en/VMware-Fusion/11/com.vmware.fusio...

Yeah and it runs sooo much quicker under fusion than under oracle virtualbox, I’m amazed people still use virtualbox given its horrendous performance.

You don't need a special script to install Macos in Fusion.