VirtualBox 5.0 RC1 发布了，5.0 是一个全新的主要版本，与 Beta4 版本比较，RC1 主要改进内容包括：
GUI: NLS fixes. NLS strings are now frozen.
GUI: Improved HiDPI support for Windows host, icons/size-hint adjustments.
GUI: Use fast scaling mechanism for integer scale-factors (s. a. here).
Separate UI/VM: fixed completely broken re-attaching to a headless VM.
Drag and drop: fixed hang when reporting host errors such as inaccessible (locked) files.
PCNet: OpenStep fix (bug #10545)
Host-only networking: an attempt to fix some VERR_SUPDRV_COMPONENT_NOT_FOUND problems
NAT: Don't forcibly reset/drop all connections when link goes down
AHCI: fixed a possible hand during VM shutdown
Audio: fix audio output if the default output device changes, before this fix it would always stream to the output device being the default when the VM was started
VBoxSVC: don't keep the support driver permanently open
VBoxManage addencpassword: read the command line from the console or from a file
vbox-img: added resize command
X11 Additions: fix for X.org servers with RandR 1.1
引用来自“daxiaoming”的评论
DND功能大赞，希望能再增强一下 Host-only 网络，现在 4.3 感觉还是比较慢。