这是 VirtualBox 5.0 beta 版本的最终版，主要改进了下面这些特性： Paravirtualization support for Windows and Linux guests to improve time-keeping accuracy and performance Make more instruction set extensions available to the guest when running with hardware-assisted virtualization and nested paging. Among others this includes: SSE 4.1, SSE4.2, AES-NI, POPCNT, RDRAND and RDSEED xHCI Controller to support USB 3 devices (requires the Extension Pack) Drag and drop support (bidirectional) for Windows, Linux and Solaris guests Disk image encryption (requires the Extension Pack) GUI: Detach mode: Terminate the GUI but keep the VM running and re-attach to a running VM process (see here). GUI: VM guest-content scaling support (including 3D acceleration) GUI: New User Interface settings page for customizing status-bar, menu-bar and guest-content scaling GUI: New Encryption settings tab for customizing encryption options for disk images GUI: HiDPI support including application icons and optional unscaled HiDPI output on Mac OS X (including 3D acceleration) GUI: Hotplugging support for SATA disks New, modular audio architecture for providing a better abstraction of the host audio backends USB hard disks Support for the NDIS6 networking framework on Windows (default on Vista and later) 下载地址：VirtualBox 5.0 beta VirtualBox 是一款功能强大的 x86 虚拟机软件，它不仅具有丰富的特色，而且性能也很优异。 VirtualBox 原先是德国一家软件公司InnoTek所开发的虚拟系统软件（已被SUN收购，而SUN已被Oracle收购），它不仅具有丰富的特色，而且性能 也很优异。VirtualBox 可以在 Linux 和 Windows 主机中运行，并支持在其中安装 Windows (NT 4.0、2000、XP、Server 2003、Vista)、DOS/Windows 3.x、Linux (2.4 和 2.6)、OpenBSD 等系列的客户操作系统。假如你曾经有用过虚拟机软件的经历的话，相信使用 VirtualBox 不在话下。即便你是一个新手，也没有关系。VirtualBox 提供了详细的文档，可以助你在短期内入门。 VirtualBox 5.0 beta 发布，开源虚拟机下载地址
