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Restart the Mac into Recovery Mode by rebooting and holding down COMMAND + R keys concurrently.

To get around that (for now until VirtualBox becomes notarized) try the following: If you’re attempting to install VirtualBox on a machine running macOS Mojave 10.14.5 or later you may run into a notarization requirement for apps outside the App Store. Can’t Install / Run VirtualBox in MacOS 10.14.5 or Later? Try This If you are still experiencing issues, refer to the next step, which is a different procedure required in later versions of MacOS.

Go ahead and run VirtualBox as usual, it should load fine without any further kernel driver error messages. Relaunch the VirtualBox installer and proceed through the installation as usual, it should now succeed as expected.At the bottom of the Security General section, look for the message stating “System software from developer ‘Oracle America, Inc’ was blocked from loading” and click the “Allow” button.Choose “Security & Privacy” and go to the ‘General’ tab within Security preference panel, then click the lock button and enter the administrator password.Now pull down the  Apple menu and open System Preferences.Quit out of the VirtualBox installer after it fails.

Run the VirtualBox installer as usual, you’ll eventually see the “Installation Failed” message.How to Successfully Install VirtualBox in MacOS Mojave (if it fails)Īssuming you have already downloaded VirtualBox onto the Mac (it’s free to download here), here is how you can successfully install and run VirtualBox in MacOS Mojave: By the way, while this article is obviously focused on VirtualBox you will find this same general process is necessary for installing other apps that include kernel extensions. The reason for the installation failure and the inability for the kernel module to load successfully is due to security restrictions in MacOS Mojave, and thus to be able to successfully install VirtualBox and run the app you will need to make a relatively simple bypass of those aforementioned security restrictions (alternatively, you can also disable Gatekeeper completely but that is generally not recommended).