VirtualBox is an open source virtualization tool with which you can run Linux or Mac OS under Windows and vice versa, a virtual drive on the hard disk where the virtualized operating system is installed that you can access as if you were actually running it.
VirtualBox Extension Pack is the official complement of this tool so that the emulator is updated with the latest and advanced functions.
VirtualBox Extension Pack is the package that VirtualBox needs to support USB 2.0, VirtualBox RDP and PXE boot for Intel cards. The installation process is very simple and is done directly from File> Preferences> Extensions.
Thanks to this pack, you will be able to use all its functions and emulate operating systems such as Mac or Linux without having to install them on your hard drive.