[dvdcxn]

It's less of a walled garden than OSX, which isn't even virtualisable.

[techntoke]

It actually can be virtualized, but it isn't as easy as Windows. I'd argue that neither of them should be used in government though.

[Wowfunhappy]

I'd posit that the primary reason it's not as "easy" to virtualize macOS is because Virtualbox, VMWare, et al haven't poured enormous sums of money into optimizing for macOS performance, as they have Windows.