[ModEdit; related ticket: #17438: Can't install Virtualbox 5.2.4 on OSX 10.13.2]
I just installed osx high sierra from scratch. When I tried to install virtualbox (first 5.2, but 5.1 has the same result) the installer ends with this message:
After installation (which fails) I am able to open the virtual box manager, but I can't run virtual machines. The result of "kextstat | grep -v com.apple" is zero (no result). I also created a ticket in the bugtracker: 17438"The installation failed" "The installer encountered an error that caused the installation to fail. Contact the software manufacturer for assistance".