Yes, you can use windows on macbook without replacing macOS. The installation process is different on Intel Macbooks than on Apple silicon chip Macbooks. In the case of models that are intel Macbooks, users can utilize Boot Camp to install Windows and switch between operating systems. In case of Macbooks equipped with M1, M2, M3, M4 or advanced Apple silicon chips virtualization programs like Parallels Desktop, can be used to run Windows 11 ARM. Thus, it permits users to operate Windows applications along with macOS applications. Prior to installation, be sure to check if there is enough space, memory, and processor compatibility along with Windows licensing requirements.