VirtualBox is a general-purpose full virtualizer for x86 hardware. Targeted at server, desktop and embedded use, it is now the only professional-quality virtualization solution that is also Open Source Software.
Modularity. VirtualBox has an extremely modular design with well-defined internal programming interfaces and a client/server design. This makes it easy to control it from several interfaces at once: for example, you can start a virtual machine in a typical virtual machine GUI and then control that machine from the command line, or possibly remotely. VirtualBox also comes with a full Software Development Kit: even though it is Open Source Software, you don’t have to hack the source to write a new interface for VirtualBox.
Virtual machine descriptions in XML. The configuration settings of virtual machines are stored entirely in XML and are independent of the local machines. Virtual machine definitions can therefore easily be ported to other computers.
Guest Additions for Windows, Linux and Solaris. VirtualBox has special software that can be installed inside Windows, Linux and Solaris virtual machines to improve performance and make integration much more seamless. Among the features provided by these Guest Additions are mouse pointer integration and arbitrary screen solutions (e.g. by resizing the guest window). There are also guest additions for OS/2 with somewhat reduced functionality.
Shared folders. Like many other virtualization solutions, for easy data exchange between hosts and guests, VirtualBox allows for declaring certain host directories as “shared folders”, which can then be accessed from within virtual machines.
- GUI: Fixes file name changes in the File location field when creating Virtual Hard Disk (bug #19286)
- VMM: Fixed running VMs which failed to start with VERR_NEM_MISSING_KERNEL_API_2 when Hyper-V is used (bug #19779 and #19804)
- Audio: fix regression in HDA emulation introduced in 6.1.0
- macOS host: Fixed webcam passthrough and audio input on Mojave and newer by requesting authorization from the user (bug #19758)
- macOS host: VBoxHeadless no longer able to start VMs (6.1.4/6.0.18 regression; bug #19706)
- Windows host: Fixes in serial port implementation
- Shared Clipboard: Fixed a potential crash when copying HTML data (6.1.2 regression; bug #19226)
- Linux host and guest: Linux kernel version 5.8 support
- EFI: Fixed reading ISO9660 filesystems on attached media (6.1.0 regression; bug #19682)
- EFI: Support booting from drives attached to the LsiLogic SCSI and SAS controller emulations