Oracle - (Open Source)
VirtualBox is an easy and elegant solution for those who want to control a computer from another computer.
VirtualBox offers virtualize your operating system (OS) guests on a host machine. Called hypervisor, the application supports Windows OS X, Linux, Mac, Solaris, FreeBSD, etc.. as host, Mac OS X missing the call as a guest.
It also includes a remote access via HTTP protocol, convenient for demonstrations on a clean system. The ability to manage multiple states of the system is particularly interesting and its interface is very simple.
Virtualization solutions allow installing an operating system on a virtual machine using the resources of the host PC , thus enjoying very good performance. In the genre, several solutions are known for their ease of use, such as VMware Workstation , Parallels Desktop or Microsoft Virtual PC 2007 SP1.
A virtual machine is a useful way to use two operating systems simultaneously and harmless to the host computer. There is the possibility to install Linux on a virtual machine on Windows and vice versa .
# The following items were fixed and/or added:
* VMM: fixed host crash when running 64-bit guests on 32-bit hosts with certain Intel CPUs (VT-x only; bug #6166)
* VMM: allow 64-bit SMP guests on 32-bit hosts (VT-x and AMD-V only; does not apply to Mac OS X, which already supports it)
* Page Fusion: several bug fixes for SMP guests (including bug #6964)
* Teleportation: several fixes and improvements
* Mac OS X server guests: compatibility fix
* EFI: fixed memory detection for guests with 2GB or more RAM assigned
* GUI: added setting for multiple VRDP connections; useful if multiple screens are enabled
* GUI: another fix for the keyboard capturing bug under metacity (bug #6727)
* GUI: fixed quit dialog when used in seamless or fullscreen mode (Mac OS X hosts only; bug #6938)
* VBoxManage: fixed storageattach error handling (bug #6927)
* VBoxManage: fixed dhcpserver add (3.2.0 regression; bug #7031)
* Storage: fixed hang with images located on filesystems which don't support async I/O (bug #6905)
* Storage: fixed raw disks on Windows hosts (3.2.0 regression; bug #6987)
* LsiLogic: fixed hang with older Linux guests
* BusLogic: fixed hang during I/O
* SATA: set initial number of ports to 1 as some guests can't handle 30 ports (e.g. CentOS 4 and FreeBSD; bug #6984)
* SCSI: fixed error when using the full format option during Windows installation (bug #5101)
* iSCSI: fixed authentication (bug #4031)
* Host-only/bridged networking: fixed excessive host kernel warnings under certain circumstances (Linux hosts only; 3.2.0 regression; bug #6872)
* NAT: fixed potential memory leaks
* NAT: increased the size of the memory pool for 16K Jumbo frames (performance tweak)
* E1000: disconnect cable was not properly handled if the NIC was not yet initialized by the guest
* OVF: export performance optimization
* OVF: upgraded OS type definitions to CIM 2.25.0 so that Windows 7 and other OSes are now tagged correctly on export
* Settings: the setting for disabling the host I/O cache was sometimes not properly saved
* USB: allow the guest to disable an EHCI port
* POSIX hosts: fixed several memory leaks (3.2.0 regression)
* Solaris hosts: fixed VDI access problem under certain circumstances (IDE/SATA; 3.2.0 regression)
* Solaris hosts: fixed VM fails to start on 32-bit hosts (3.2.0 regression; bug #6899)
* Linux Additions: re-read a directory after a file was removed (bug #5251)
* Windows Additions: automatic logon on Windows Vista/Windows 7 is now able to handle renamed and principal user accounts; added various bugfixes
* Windows Additions: improved command line parsing of the installer
* 3D support: fixed OpenGL support for 32bit apps under 64bit Windows guests