Repeated crash on install on Mojave 10.14.3

[Ardiboy]

I'm running a MacBook Pro on Mojave - 16GB RAM, 700GB free on a SSD drive. I've had a number of earlier versions installed on this computer with no problems.
I've downloaded the version of VirtualBox (6.0.4) - appears to download clean but when I install it, it immediately fails.
Log shows the following:

Code: Select all

Mar 28 09:37:34 MacBook Installer[14091]: @(#)PROGRAM:Install  PROJECT:Install-1000
Mar 28 09:37:34 MacBook Installer[14091]: @(#)PROGRAM:Installer  PROJECT:Installer-934.1
Mar 28 09:37:34 MacBook Installer[14091]: Hardware: MacBookPro11,3 @ 2.60 GHz (x 8), 16384 MB RAM
Mar 28 09:37:34 MacBook Installer[14091]: Running OS Build: Mac OS X 10.14.3 (18D109)
Mar 28 09:37:34 MacBook Installer[14091]: Oracle VM VirtualBox 6.0.4 Installation Log
Mar 28 09:37:34 MacBook Installer[14091]: Opened from: /Volumes/VirtualBox/VirtualBox.pkg
Mar 28 09:37:34 MacBook Installer[14091]: Package Authoring Error: <background> has an unsupported MIME type: image/data
Mar 28 09:37:34 MacBook Installer[14091]: Package Authoring Error: <background_scaling> has an unsupported MIME type: X-NSObject/NSNumber
Mar 28 09:37:34 MacBook Installer[14091]: Package Authoring Error: <background_alignment> has an unsupported MIME type: X-NSObject/NSNumber
Mar 28 09:37:34 MacBook Installer[14091]: Package Authoring Error: <layout-direction> has an unsupported MIME type: X-NSObject/NSNumber
Mar 28 09:37:38 MacBook Installer[14091]: InstallerStatusNotifications plugin loaded
Mar 28 09:37:43 MacBook Installer[14091]: ================================================================================
Mar 28 09:37:43 MacBook Installer[14091]: User picked Standard Install
Mar 28 09:37:43 MacBook Installer[14091]: Choices selected for installation:
Mar 28 09:37:43 MacBook Installer[14091]: 	Install: "Oracle VM VirtualBox"
Mar 28 09:37:43 MacBook Installer[14091]: 	Install: "Oracle VM VirtualBox Kernel Extensions"
Mar 28 09:37:43 MacBook Installer[14091]: 	Install: "Oracle VM VirtualBox"
Mar 28 09:37:43 MacBook Installer[14091]: 	Install: "Oracle VM VirtualBox Command Line Utilities"
Mar 28 09:37:43 MacBook Installer[14091]: 	Install: "FUSE for macOS core package"
Mar 28 09:37:43 MacBook Installer[14091]: ================================================================================
Mar 28 09:37:43 MacBook Installer[14091]: Configuring volume "Macintosh HD"
Mar 28 09:37:43 MacBook Installer[14091]: Free space on "Macintosh HD": 741.22 GB (741215297536 bytes).
Mar 28 09:37:43 MacBook Installer[14091]: Create temporary directory "/var/folders/13/1989hjv132d2sh_g918b8rx80000gn/T//Install.14091jWA0eg"
Mar 28 09:37:43 MacBook Installer[14091]: IFPKInstallElement (4 packages)
Mar 28 09:37:43 MacBook Installer[14091]: PackageKit: Enqueuing install with framework-specified quality of service (utility)
Mar 28 09:37:43 MacBook installd[552]: PackageKit: ----- Begin install -----
Mar 28 09:37:46 MacBook installd[552]: 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";
	}
Mar 28 09:37:46 MacBook Installer[14091]: Install failed: The Installer encountered an error that caused the installation to fail. Contact the software manufacturer for assistance.
Mar 28 09:37:46 MacBook Installer[14091]: IFDInstallController 3BA5020 state = 8
Mar 28 09:37:46 MacBook Installer[14091]: Displaying 'Install Failed' UI.
Mar 28 09:37:46 MacBook Installer[14091]: 'Install Failed' UI displayed message:'The Installer encountered an error that caused the installation to fail. Contact the software manufacturer for assistance.'.

Any ideas?

[socratis]

Is that the whole installer log? Doesn't look like it, let's try this one more time...

You might want to print the following steps, or save them in a test file on your desktop, because there are a couple of reboots, and you don't want to go "hunting" in the forums...

1. Download the latest release, or the latest test build (NOT the development snapshot), if you don't already have them.
2. Reboot.
3. Make sure you're part of the "admin" group. If you are logged in with the primary user account/owner, you are part of the admin group.
4. Mount the DMG from the previous step. Run "VirtualBox_Uninstall.tool". Make sure there are no error messages. If there are, please post them, exactly as they appear.
5. Reboot.
6. Mount the DMG from the previous steps. Double-click the "VirtualBox.pkg". As soon as you start the installation, press Cmd+L to show the log. Select "Show All Logs" from the drop-down menu. Before the last step of the installation (Done), click the "Save" in the log window. ZIP and attach that file.
7. Start VirtualBox. If it crashes, open "Console.app" and look at "~/Library/Logs". Is there a VirtualBox related log with the current date/time? ZIP and attach that file as well.