As a result, the guest operating system running on the virtual machine does not run as fast as in Boot Camp. Virtualization on the Mac makes use of a software layer called a hypervisor to emulate all of the underlying hardware. Virtualization abstracts the hardware layer, making it look like each operating system has its own processor, RAM, graphics, and storage. Virtualization allows several operating systems to run on computer hardware at the same time.

Performance tuning and customization needed to achieve the best performance.