While easier, Niresh might be less stable than a carefully configured Vanilla install.
: Systems installed via Niresh are notoriously difficult to update; a standard Apple security patch can easily "break" the entire system.
macOS High Sierra - Technical Specifications - Apple Support
For educational or legacy hardware tinkering inside a VM, you might find (pre-installed). Those are safer because they run in a sandbox. Search for “macOS High Sierra VMware image 202x” – no Niresh required.
