Oct 302013

I’ve been struggling with VirtualBox 3.0 since I’ve upgraded my MacBook Pro to Mavericks one week ago.

The problem was that launching the software and Virtual Machines led to kernel errors like “Kernel Driver not loaded” and “Failed to load VMMR0.r0”

Googling leads to VirtualBox Forums and Apple Support Community posts stating to reinstall VirtualBox on top of existing installation, but this fixes the issue only temporarily since at reboot the issue will be still there.

Likewise, dragdropping VirtualBox to the Trash Bin and reinstalling seems not to help.

Even using the uninstal tool provided with VirtualBox does not seem to help.



The final trick is to modify the Mavericks security settings (Security & Privacy – General tab) for the time needed for the reinstallation, configuring the parameter “Allow apps downloaded from:” to Anywhere as shown below:


Then confirm, proceed to install VirtualBox 3.0 and change back the setting to previous safer configuration.

Once completed, you can enjoy a “reboot-safe, error-free” VirtualBox environment.


  2 Responses to “VirtualBox and Mavericks – Friends as long as Security Settings are ok.”

  1. All very good, except that when I reboot I still get “Failed to load VMMR0.r0” when I try and start a VM.

  2. Thanks for your comment. This is bizarre, since I just tried a reboot and the error does not popup for me.
    It is certainly true that Oracle could have done a better compatibility testing job with Mavericks developers preview 😉 before claiming that VB 3.0 was perfect for Mavericks…
    However, maybe what you’re hitting is not a compatibility issue. I’ve found details about this being a permission issue here.
    And this other one says pretty much the same for Mac.
    You might want to check it out and, please, post here if it will fix your issues.

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