Virtual machines allow you to install and run Windows or other operating systems in a window on your Macbook. I don’t want to repeat what others already said so I will instead list some other ways to run Windows on a Macbook without Boot Camp Assistant (namely, virtual machines) and point out advantages and disadvantages to each of them. If you google “how to install windows on mac without bootcamp assistant”, most of the top articles there will describe ways to install Windows alongside macOS by hand or using third-party software. In these cases users search for alternatives to Boot Camp. Unfortunately, there are times when Windows installation via Boot Camp fails, or Boot Camp Assistant does not allow users to install a specific version of Windows that they need. When users want to install Windows operating system on their Mac computers, Macbooks’ own Boot Camp is the obvious way to do it.