How to Install Oracle Virtualbox Extension Pack on Windows 11 | Virtualbox in Windows11 - VirtualBox is an open source virtualization tool which can run Linux or Mac OS on Windows and vice versa. It acts as virtual drive from where you can install the virtual operating system and access it as if you were running it for real. VirtualBox Extension Pack is the official add-on for this tool and updates the emulator with new and advanced features.With this pack, you can emulate operating systems like Mac or Linux and use all their features without installing them on your hard drive.