VirtualBox 5.1.0 RC1

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.

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.

What's changed since version 5.1 Beta 3:

• VMM: fixed flip-flop handling of edge-triggered interrupts.
• VMM: enable X2-APIC for Linux guests by default.
• VMM: many fixes
• GUI: fixed hang on X11 caused by the infinite loop where multi-screen full-screen windows were grabbing keyboard one after another (Qt5 migration regression).
• GUI: fixed X11 Qt5 migration consequences related to multi-screen full-screen support was broken heavily (all heads on the same host-screen, no mini-toolbar).
• GUI: fixed VBox GUI on solaris10.
• GUI: improved keyboard capturing on X11 hosts
• GUI: Fixed broken keyboard support on Windows host with separate UI (Qt5 migration regression)
• GUI: Added medium-type descriptions for the Medium Type Change dialog
• API: when taking a screenshot, don't save garbage for blanked screen.
• API: on OS X host don't lose extradata (5.1 Beta 1 regression)
• NAT: correctly parse resolv.conf with multiple separators (5.1 Beta 3 regression)
• VGA: fixed an occasional hang when running Windows guests with 3D enabled
• Audio: enabled new audio code
• NetFlt/Win: NDIS5 bridging driver installation issue resolved.
• VBoxSVC: fixed several memory leaks when handling .dmg images
• Installers: ship VBoxBugReport
• Linux hosts: fixed VERR_VMM_SET_JMP_ABORTED_RESUME Guru Meditations on hosts with Linux 4.6 or later (bug 15439)
• Winows hosts: fixed installing of bridged networking drivers on Windows Servere 2003 and Windows XP
• Windows hosts: properly fall back to NDIS5 on pre-Vista hosts on silent installations
• Solaris hosts: fixed a crash on hosts with certain CPU configurations

Please do NOT use this VirtualBox Release Candidate release on production machines. A VirtualBox Release Candidate release should be considered a bleeding-edge release meant for early evaluation and testing purposes.

Download: VirtualBox 5.1.0 RC1 | 114.0 MB (Open Source)
View: VirtualBox Home Page