

To uninstall the VirtualBox, download the latest version from.If none of the above solutions are not fixing the NS_ERROR_FAILURE (0x80004005) error, then uninstall the VirtualBox and re-install it again. Once installed, perform the steps listed in Solution 4 above.Download the dmg and follow the installation process.If there is any update available, another window will popup and display the available update and the link of the dmg file.A small screen will popup and check for any update.From the menu select VirtualBox > Check for updates….

To update the VirtualBox to its latest version follow these steps: If the above solution were not fixing the problem, then see if there is any update available for the VirtualBox and install the update if there is any. Quit the VirtualBox and launch it again.If the errors appear again, check the System Preferences > Security & Privacy > General tab and see if there is a warning like System software from developer “Oracle America, Inc.” was blocked from loading along with an Allow button that appears below the App Store and identified developers option. Keep the System Preferences screen open and launch the virtual box and then the virtual machine.Under the Allow apps downloaded from section, make sure the App Store and identified developers option is selected.

