- In addition, Mac OS X support in Oracle VM VirtualBox is an experimental feature. See Known Limitations. Be sure to enable I/O APIC for virtual machines that you intend to use in 64-bit mode. This is especially true for 64-bit Windows VMs. See Section 3.4.2.
- The Guest Additions for anything ≥10.14 need to be notarized in order to be allowed to install the kexts. Currently they're not. It doesn't have anything to do with the read-only filesystem in 10.15. And BTW, you have a 10.14 guest, that doesn't even come into play.
- Oracle VM VirtualBox is an open source and cross-platform virtualization utility that makes it possible to extend your computer's capabilities so that it can be used to run a large number of operating systems (inside multiple virtual machines), using the same hardware you use for your daily tasks.
In order to access certain aspects of a virtual machine in VirtualBox, you will need to install Guest Additions (similar to VMWare Tools I guess)
There is a manual page for installing Guest Additions but not all of it is self-explanatory…
![Addons Addons](https://news.mydrivers.com/Img/20110218/S10433319.png)
You would be surprised, but development of a virtualizer with complexity fo VirtualBox costs well over $100 million dollars. And Guest Additions for Mac OS X could cost a several hundred thousand dollars, yeah. Engineers are super-expensive.
First you need to log into your Linux virtual machine (VM) and install/configure x, y and z.
Install DKMS
This part is relatively straightforward, just install using whatever package manager your Linux distribution has. The below example uses APT that comes with Debian-based distros:
Where to find VBoxGuestAdditions.iso
Usefully Oracle don’t tell you in their guide, but it is available with the rest of the downloads at http://download.virtualbox.org/virtualbox/
So for example for version 4.1.6 the VBoxGuestAdditions_4.1.6.iso is located at http://download.virtualbox.org/virtualbox/4.1.6/VBoxGuestAdditions_4.1.6.iso
You need this image to install the VirtualBox Guest Additions themselves onto your VM, so you can either download it to your Linux VM and mount it there, or (which is what I did) download it to your Mac OS X host and mount it in the DVD drive using the VirtualBox Manager.
How to mount the image
You need to mount the image on the Linux VM, so that you can install VirtualBox Guest Additions from it. If you have mounted it in the VirtualBox Manager in the DVD drive then you will still need to mount it in the Linux VM; Since I can’t remember the last time I had to mount something in *nix from the command-line, here’s a quick way.
Then you should see VBoxLinuxAdditions in that directory, which you need to run as per the manual. If the above doesn’t work it might be because your DVD drive in VirtualBox is called something else, like dvd (instead of dvd1) which probably differs depending on which distro you’re using.
Then you need to run the installer.
Once that’s done you can restart.
Everything should be finished now installation/configuration-wise, but you might encounter some problems… (otherwise skip to Mount the host folder)
Kernel header problems
I got some missing kernel header problems when trying to install Guest Additions, which if building the main Guest Additions module fails will be logged.
If you see something like this…
So you can do just that!
Hopefully this should install now (although the XFree86 bit will fail, assuming you’re using the command-line) and you may need to restart the VM, although I’m not sure.
Mount the host folder
You can create the host folder in the VirtualBox Manager in the Shared Folders tab on the Settings for that VM. If you add it on the command-line it’ll appear under the machine folders anyways. If you want to type it though, here’s what you’d type into the Mac OS X terminal (note this is the only thing that you’d type into the host itself)
To mount the Shared Folder from within the guest, the instructions from Ubuntu (as my guest is Ubuntu, although I think this is a better way to mount it anyways) were very useful.
Virtualbox Guest Additions For Mac Download
Just change the target to be wherever you want the Shared Folder to be mounted in the guest. Now in theory if you go to that path in the guest, it should be the same as the directory you shared from the host!