That is largely due to a mix of Apple's investment in emulation technologies, and Apple's ability to exert influence on third party developers and vendors to ke

That is largely due to a mix of Apple's investment in emulation technologies, and Apple's ability to exert influence on third party developers and vendors to keep up with their latest tooling. Very little to do with the Mach kernel. The ability to move between hardware platforms also has very little do with the ability to run operating systems in virtualization. Case in point is that Apple is one of the last major OSes to include a hypervisor in the OS.