cannot install virtualbox on OSX 10.12.14

[kaboomfox]

I updated to 10.12.14 and now I cannot install virtualbox.

xxxx: 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";
xxxx installd[410]: PackageKit: Running idle tasks
xxxx installer[1276]: 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”.}
	}
xxxx installd[410]: PackageKit: Running idle tasks
xxxx installer[1276]: 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”.}

[kaboomfox]

tried copying over the uninstaller tool and running it with sudo. Restarted and ran again. It didn't help.

[kaboomfox]

The issue was because I still had a folder with my old VMs and it was blocking the install. I deleted it and restarted my computer and it worked.

[Socratis]

Replying to kaboomfox:

The issue was because I still had a folder with my old VMs and it was blocking the install.

No, definitely no. 1) Nobody could upgrade with their guests intact, and 2) the installer does not deal/care about that folder.

and restarted my computer and it worked.

That would be the real reason. It's the first suggestion when an installation fails.

So, it seems that it worked, right? Which means the ticket can be closed?