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I typed:

brew cask install virtualbox

and as result I got:

==> Satisfying dependencies ==> Downloading http://download.virtualbox.org/virtualbox/5.2.0/VirtualBox-5.2.0-118431-OSX.dmg Already downloaded: /Users/gsi-frank/Library/Caches/Homebrew/Cask/virtualbox--5.2.0-118431.dmg ==> Verifying checksum for Cask virtualbox ==> Installing Cask virtualbox ==> Running installer for virtualbox; your password may be necessary. ==> Package installers may write to any location; options such as --appdir are ignored. Password: ==> installer: Package name is Oracle VM VirtualBox ==> installer: Installing at base path / ==> installer: The install failed (The Installer encountered an error that caused the installation to fail. Contact the software manufacturer for assistance.) Error: Command failed to execute!

==> Failed command: /usr/bin/sudo -E -- /usr/sbin/installer -pkg /usr/local/Caskroom/virtualbox/5.2.0-118431/VirtualBox.pkg -target /

==> Standard Output of failed command: installer: Package name is Oracle VM VirtualBox installer: Installing at base path / installer: The install failed (The Installer encountered an error that caused the installation to fail. Contact the software manufacturer for assistance.)

==> Standard Error of failed command:

==> Exit status of failed command:

I noticed the Virtualbox is installed and I even created a VM without problem, but my fear is that this error come to hunt me in the most inopportune moment ;)

How can I get rid of this error? What are the implications of this error? Where could I find more info about it? some log or something like that

macOS 10.13.1 brew updated

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High Sierra now requires explicit user permission before kernel extensions can be ran (KEXT)

read about it here (tl;dr Go to system preferences/security & privacy and click on allow VirtualBox)

enable virtualbox KEXT and then run

brew cask reinstall --force virtualbox

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