VirtualBox is a powerful x86 and AMD64/Intel64 virtualization product for enterprise as well as home use. Targeted at server, desktop and embedded use, it is now the only professional-quality virtualization solution that is also Open Source Software. Presently, VirtualBox runs on Windows, Linux, Macintosh, and Solaris hosts and supports a large number of guest operating systems including but not limited to Windows (NT 4.0, 2000, XP, Server 2003, Vista, Windows 7, Windows 8, Windows 10), DOS/Windows 3.x, Linux (2.4, 2.6, 3.x and 4.x), Solaris and OpenSolaris, OS/2, and OpenBSD.
Some of the features of VirtualBox are:
- 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.
This is a maintenance release. The following items were fixed and/or added:
- VMM: Added nested paging support for nested virtualization (Intel hosts only)
- VMM: Fixed rare guru meditations with certain guests on macOS 10.15 (Catalina) (bug #21237)
- VMM: Fixed possible VM process crash on Windows hosts when Hyper-V is used with certain guests (bug #21174)
- VMM: Fixed Windows XP guest hang or BSOD on AMD CPUs under certain circumstances (bug #21256)
- GUI: Various bugfixes for the Guest Control file manager
- GUI: Added more informative file operations in the Guest Control file manager
- GUI: Added an option to the global settings (the display page) to resize user interface font
- GUI: Fixed a regression in new vm wizard. Selected virtual disks are no longer deleted when the wizard is cancelled (bug #21244)
- GUI: Added a new menu item to the devices menu to optionally upgrade the guest additions.
- VirtioSCSI: Fixed recognition of the virtio SCSI controller by the EFI firmware (bug #21200)
- VirtioSCSI: Fixed hang when shutting down the VM if the virtio SCSI controller is used (bug #21144)
- virtio-net: Workaround a bug in the virtio-net driver included in FreeBSD version up to 12.3 which renders the device non functional (bug #21201)
- Storage: Fixed I/O errors with the VirtioSCSI controller when the host I/O cache is enabled (bug #19717)
- VBoxManage: Fixed regression when 'createmedium disk --variant RawDisk' command resulted in invalid .vmdk file (bug #21125)
- Main: Restored input pointing device behavior in multi-monitor VM configuration (bug #21137)
- Main: Fixed progress indication during automatic Linux Guest Additions installation
- Guest Control: Fixed path handling issues (bug #21095)
- 3D: Fixed VM process crash on macOS with 3D enabled (bug #21232)
- Linux Host and Guest: General improvements in startup scripts
- Linux Guest Additions: Introduced initial support for RHEL 8.7 and 9.2 kernels (bug #21272, #21258)
- Linux Guest Additions: Introduced initial support for SLES 15.4 kernels
- Linux Guest Additions: Fixed kernel modules rebuild behavior on system shutdown
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