Installed OS X Mavericks and VM Box now doesn’t work. I’ve been getting the following error, failed to load VMMR0.r0 (VERR_SUPLIB_OWNER_NOT_ROOT).
Here’s how to solve.
1. Open Terminal
2. Type the following : sudo chown root /Applications
3. VM Should start.
This was happening to me on the latest version of Virtual Box and OS X was fully patched.