Share a folder from the host Mac OS to the guest Linux system in VirtualBox

You will need the latest version of VirtualBox (4.3.10) with Guest Additions installed in Ubuntu .

• After powering off the virtual machine and selecting the virtual machine in VirtualBox, go to: Machine > Settings... > Shared Folders
• For Folder Path, click the icon to browse for the folder you want to share.
• For Folder Name, enter a name to describe the share.
• Click OK and start the virtual machine again.
• Create a mount point which is basically an empty folder.
• Launch Terminal and enter: sudo mount -t vboxsf folder_name path_to_mount_pointfolder_name is the name you entered earlier to describe the share.
• You should now be able to browse the shared folder.

If the installation is difficult, such as the following errors:

mount: wrong fs type, bad option, bad superblock on mydata,
   missing codepage or helper program, or other error
   (for several filesystems (e.g. nfs, cifs) you might
   need a /sbin/mount.<type> helper program)
   In some cases useful info is found in syslog - try
   dmesg | tail  or so

Perform the following steps:

sudo rm /sbin/mount.vboxsf
sudo ln -s /opt/VBoxGuestAdditions-4.3.10/lib/VBoxGuestAdditions/mount.vboxsf /sbin/mount.vboxsf