It has more features than VirtualBox and lets you virtualize a Boot Camp partition. Parallels is a paid method of virtualizing Windows. Run the Guest Additions installer in Windows. When Windows is running, go to “Devices,” then select “Insert Guest Additions” CD Image. Since the virtual hard disk is empty, choose “Custom Install” at the prompt. VirtualBox will launch the Windows installer. Click Choose “Virtual Optical Disk File” to direct VirtualBox to the ISO. To install Windows, select the “Storage” tab. Click “Settings” in the toolbar and allocate resources. When the installation is complete, select the virtual machine in the sidebar.

Of course, storage will be limited to the partition sizes you select when originally splitting the hard drive, but resources from the CPU and RAM, for example, will still be fully accessible across both operating systems. This essentially allows you to choose which operating system you want to boot to when starting your Mac while still being able to access the computer’s full set of resources.

To dual boot, you need to first partition your Mac’s hard drive with one partition acting as the macOS area, and the other partition acting as the Windows area. There are numerous options out there but the best can be categorized by two main approaches: dual booting and virtualization. People have been trying to develop ways of accessing multiple operating systems on the same hardware for years.

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