VirtualBox 6.0.0 Build 127566

What's new in this version:

This is a major update. The following major new features were added:
- Implemented support for exporting a virtual machine to Oracle Cloud Infrastructure
- User interface: greatly improved HiDPI and scaling support, including better detection and per-machine configuration
- Major rework of user interface with simpler and more powerful application and virtual machine set-up
- User interface: a new file manager enabling user to control the guest file system and copy files between host and guest.
- Graphics: major update of 3D graphics support for Windows guests, and VMSVGA 3D graphics device emulation on Linux and Solaris guests
- Added support for surround speaker setups (as used by Windows 10 Build 1809)
- Added utility vboximg-mount on Apple hosts to access the content of guest disks on the host
- Added support for using Hyper-V as the fallback execution core on Windows host, to avoid inability to run VMs at the price of reduced performance

In addition, the following items were fixed and/or added:
- Execution core: fixed single-stepping in certain circumstances
- User interface: video and audio recording can now be separately enabled
- Audio/Video recording fixes and improvements
- Audio: better support for attaching and detaching remote desktop connections
- Serial port emulation fixes
- Serial ports: allow changing the serial port attachment while a machine is running
- Networking: Added a workaround for older guests which do not enable bus mastering for the virtio PCI device
- Networking: fixed wrong RCODE from DNS AAAA query with --natdnshostresolver1
- iSCSI: In cases where there is no ambiguity, the LUN of an iSCSI target is automatically determined, for targets with non-zero LUNs
- Transparently resize disk images when merging if possible
- VBoxManage: support for DHCP options
- Fixed VNC/RDP
- Guest Control: various new interfaces and features (see SDK documentation)
- Linux hosts: support Linux 4.20 (thank you Larry Finger)
- Solaris: installer fixes
- Shared folders: performance improvements
- Guest Additions: improved shared folder auto-mounting
- Windows Guest Additions: fix incorrect tablet co-ordinate handling with recent Windows 10 builds
- Linux Additions: fix for building vboxvideo on EL 7.6 standard kernel, contributed by Robert Conde
- Linux guests: support Linux 4.20 (thank you Larry Finger)
- Linux guests: support VMSVGA in the Linux and X11 Additions
- MacOS Guest Additions: initial support
- OS/2 Guest Additions: initial shared folder support
- BIOS fixes
- ACPI: Up to four custom ACPI tables can now be configured for a VM