Windows on Mac describes the ability to access and use a Windows operating system on a Mac computer. One way to run Windows on a Mac is with a virtual machine, which allows Windows to run through the software on the computer. With a virtualization program, Windows runs as a macOS application alongside other applications and can be used simultaneously. A second way to run Windows on a Mac is to use the configuration utilities included with a Mac to partition the computer’s hard drive for different operating systems. In this configuration, only one operating system can be used at a time, so users must reboot to switch between Windows and macOS systems.