Virutalbox fails to install on MacOS 10.13.5

[jav]

Virtualbox fails to install without any obvious explanation except this part of the logs:

error	18:32:10.563277 +0200	syspolicyd	Kernel Extension BLOCKED: <private>
default	18:32:10.563624 +0200	kextd	Kext rejected due to system policy: <OSKext 0x7f9b8a0dadb0 [0x7fffad793af0]> { URL = "file:///Library/StagedExtensions/Library/Application%20Support/VirtualBox/VBoxDrv.kext/", ID = "org.virtualbox.kext.VBoxDrv" }
default	18:32:10.563667 +0200	kextd	org.virtualbox.kext.VBoxDrv failed security checks; failing.

It was also tested with VirtualBox-5.2.97-122902-OSX

[jav]

To be able to install the process is :

• install virtual box until the failure message appears
• start the preference / security & privacy
• accept the changes requested by oracle
• reinstall Virtualbox.

That would be great to mention that it on the error message.