I have an Ubuntu installation on a partition on my Mac and I would like to boot Ubuntu from within Mac OS X using VirtualBox. When I want to start the machine I only get
Error loading operating system
I followed more or less these instructions for the setup.
I have also tried a ton of different settings for the virtual machine (IDE vs SATA, IO-APIC, etc.), none of them bringing me closer. Here is a summary:
MacBook Pro 2009
Host: MAC OS X Mavericks on
Guest: Ubuntu 12.04 LTS 64-bit on
sudo chmod 777 /dev/disk0s4