The error message indicates that there is a disparity between the extension and VirtualBox versions. This can be because either of them is outdated or the extension ...
These instructions show how to setup VirtualBox for PXE/Netboot, share a vdi hard drive among users/ accounts on a mac and how to move the VirtualBox settings or preferences between users. I assume ...
At the time of writing, VirtualBox 4.0.0's Check for Updates command did not detect the availability of the new version, which can be downloaded here. There is also a new version of the Oracle VM ...
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