VirtualBox 4.2.8 Build 83876 adalah aplikasi gratis yang dapat Anda gunakan untuk melakukan pengujian OS dalam Windows atau OS lain. Anda dapat menguji OS Windows, Linux, dan Mac tanpa perlu Anda install di komputer Anda. VirtualBox merupakan aplikasi virtual untuk menguji OS yang cukup populer. Sebelum Anda menginstall ulang OS yang ingin Anda gunakan alangkah baiknya jika kita uji dahulu sehingga Anda tidak dipusingkan dengan kegagalan OS yang hendak digunakan.

Supported OS:

• Windows : Windows XP, Server 2003, Server 2008, Windows 7, Server 2012, Windows 8 (32-bit and 64-bit).
• Mac OS X hosts: 10.6 (Snow Leopard, 32-bit and 64-bit), 10.7 (Lion, 32-bit and 64-bit), 10.8 (Mountain Lion, 64-bit).
• Linux hosts (32-bit and 64-bit): Ubuntu 8.04 (“Hardy Heron”), 8.10 (“Intrepid Ibex”), 9.04 (“Jaunty Jackalope”), 9.10 (“Karmic Koala”), 10.04 (“Lucid Lynx”), 10.10 (“Maverick Meerkat), 11.04 (“Natty Narwhal”), 11.10 (“Oneiric Oncelot”), 12.04 (“Precise Pangolin”), Debian GNU/Linux 5.0 (“lenny”) and 6.0 (“squeeze”), Oracle Enterprise Linux 4 and 5, Oracle Linux 6.

Changes in VirtualBox 4.2.8 (released 2013-02-28):

• VMM: fixed guest crash with huge amount of guest RAM on VT-x hosts (bug #11306)
• GUI: fixed a layout bug in the Mac OS X clone VM dialog (bug #10982)
• GUI: not all the translation tags were taken into account during the language switch (bug #11342)
• GUI: take guest screenshot dialog sometimes had no keyboard input available on Windows host
• Main/Machine: fix generation of spurious event for inaccessible VMs which triggered an endless event generation loop in cooperation with the GUI which became unresponsive (4.2.6 regression, bug #11323)
• Main/Display: fix for an access violation under certain conditions in multi-monitor configurations (bug #10539)
• Main/Metrics: network metrics are now collected for active (up) interfaces only, the state of an interface being evaluated when the associated metric is enabled via setupMetrics
• Snapshots: reduce the time for merging snapshots under certain conditions
• Storage: fixed data corruption after resizing a VDI image under certain circumstances (bug #11344)
• Storage: fixed non working online merging of snapshots (4.2.6 regression, bug #11359)
• Storage: fixed crash when connecting to certain QNAP iSCSI targets
• Storage: fixed incompatibility of VHD differencing images with Hyper-V (bug #5990)
• Bridged Networking: fixed TCP pseudo header checksum computation for IPv6 (bug #9380)
• 3D support: fix Battlefield 1942 game crashes (bug #11369)
• Settings: really sanitize the name of VM folders and settings file, the code was disabled before (bug #10549)
• Settings: allow to change VRDE settings for saved VMs
• VBoxManage: don’t crash during screenshotpng if there is no display (bug #11363)
• Linux hosts: work around gcc bug 55940 which might lead to wrong kernel module code if gcc 4.7 is used to compile the 32-bit Linux host kernel (bug #11035)
• Linux hosts: fixed inconsistent lock state and deadlock warnings on module load and VM startup when CONFIG_PROVE_LOCKING is enabled (bug #11318)
• Linux hosts: made “]” key work again on Japanese keyboards
• Mac OS X hosts: don’t crash the kernel during dtrace if the VBox kernel extensions are loaded (10.6 hosts only; bug #11273)
• Solaris / Mac OS X hosts: machine CPU load metrics now report 100% when all cores are fully utilized (used to be a single core)
• Solaris 11 host installer: wait for any services left over from a previous installation to be terminated to avoid confusing SMF.
• Guest Additions: don’t block signals for processes executed via guest control
• Guest Additions: fixed a small memory leak in VBoxService (bug #10970)
• Windows Additions: fixed shared folder issue with large reads/writes on 64 bit Windows guests (bug #11115)
• Linux Additions: added auto-logon support for Linux guests using LightDM as the display manager
• Linux Additions: Linux 3.8 compile fixes (bug #11036)
• X11 Additions: fixed blocked SIGALRM in 3D desktop sessions (bug #10987)
• X11 Additions: fixed an unresolved reference in vboxvideo_drv for X.org 6.8 guests and before (e.g. RHEL4; 4.2.0 regression)
• X11 Additions: fixed screen automatic resizing for guests with X.org 1.3 or older (4.2.0 regression)