Error installing Virtualbox 5.1.10 on macOS Sierra, "The installation failed"
<p>I just got one of those new, shiny MacBook Pros and I'm setting up my dev environment. I downloaded Virtualbox 5.1.10 from the website and installed it and got an error "The installation failed."</p>

<p>Looking at the logs: </p>

<pre><code>Nov 28 10:41:51 Zacks-MBP installd[312]: PackageKit: Install Failed: Error Domain=PKInstallErrorDomain Code=112 "An error occurred while running scripts from the package “VirtualBox.pkg”." UserInfo={NSFilePath=./postflight, NSURL=file://localhost/Volumes/VirtualBox/VirtualBox.pkg#VBoxKEXTs.pkg, PKInstallPackageIdentifier=org.virtualbox.pkg.vboxkexts, NSLocalizedDescription=An error occurred while running scripts from the package “VirtualBox.pkg”.} {
        NSFilePath = "./postflight";
        NSLocalizedDescription = "An error occurred while running scripts from the package \U201cVirtualBox.pkg\U201d.";
        NSURL = "file://localhost/Volumes/VirtualBox/VirtualBox.pkg#VBoxKEXTs.pkg";
        PKInstallPackageIdentifier = "org.virtualbox.pkg.vboxkexts";
    }
Nov 28 10:41:51 Zacks-MBP installd[312]: PackageKit: Running idle tasks
Nov 28 10:41:51 Zacks-MBP installd[312]: PackageKit: Done with sandbox removals
Nov 28 10:41:52 Zacks-MBP Installer[87983]: install:didFailWithError:Error Domain=PKInstallErrorDomain Code=112 "An error occurred while running scripts from the package “VirtualBox.pkg”." UserInfo={NSFilePath=./postflight, NSURL=file://localhost/Volumes/VirtualBox/VirtualBox.pkg#VBoxKEXTs.pkg, PKInstallPackageIdentifier=org.virtualbox.pkg.vboxkexts, NSLocalizedDescription=An error occurred while running scripts from the package “VirtualBox.pkg”.}
Nov 28 10:41:52 Zacks-MBP installd[312]: PackageKit: Removing client PKInstallDaemonClient pid=87983, uid=501 (/System/Library/CoreServices/Installer.app/Contents/MacOS/Installer)
Nov 28 10:41:52 Zacks-MBP Installer[87983]: Install failed: The Installer encountered an error that caused the installation to fail. Contact the software manufacturer for assistance.
Nov 28 10:41:52 Zacks-MBP Installer[87983]: IFDInstallController 1EF50 state = 8
Nov 28 10:41:52 Zacks-MBP Installer[87983]: Displaying 'Install Failed' UI.
Nov 28 10:41:52 Zacks-MBP Installer[87983]: 'Install Failed' UI displayed message:'The Installer encountered an error that caused the installation to fail. Contact the software manufacturer for assistance.'.
</code></pre>

<p>Information on the Virtualbox servers is pretty sparse. I tried installing via <code>brew</code> but got an error as well.</p>

<p>Does anyone have tricks they can share about successfully installing Virtualbox on Sierra?</p>