id summary reporter owner description type status component version resolution keywords cc guest host 17803 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: default 18:32:10.563624 +0200 kextd Kext rejected due to system policy: { 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" defect new host support VirtualBox 5.2.12 install other Mac OS X