Oracle is proud to announce the availability of VirtualBox 5.1 Release Candidate 1.
This release is a major improvement which include a large number of enhancement and bug fixes.
See all the details here with a complete list of enhancements, bug fixes and links to download the software.
Please do _NOT_ use this VirtualBox Release Candidate on production machines. A VirtualBox Release Candidate should be considered a bleeding-edge release meant for early evaluation and testing purposes.
The Oracle VirtualBox Team