I use VirtualBox 6.1, but had the same problems with 6.0.14.
I'm running a virtual machine with MacOS 10.15.1 without any problems.
For me it is not possible to update the virtual machine to 10.15.2.
I tried these things:
- Chose the update in System Preferences / Software Update
- Download the 10.15.2 combo update and install that
- Create an ISO from the 10.15.2 Installer Application and boot from DVD/ISO Image
Going to EFI and searching for the boot.efi in the macos_updates folder does not help. After failing, it is still possible to boot into the 10.15.1 version by manually selecting the correct entry in the Boot selection of EFI. Log files don't show anything.
Was anyone able to update to 10.15.2 or install a clean 10.15.2? Can someone confirm the problem?