I have some issues with Vagrant shared folders, my base system is Ubuntu 13.10 desktop.
I do not understand why I have this error is something that is not right conf
I found this issue addressed here vagrant issues. Two ways to do it:
Run this on guest (i.e. after you ssh into vbox via vagrant ssh )
sudo ln -s /opt/VBoxGuestAdditions-4.3.10/lib/VBoxGuestAdditions /usr/lib/VBoxGuestAdditions
Then run vagrant reload to correctly mount the folders.
As @klang pointed out, update the VBoxGuestAdditions.iso file on your mac:
wget https://www.virtualbox.org/download/testcase/VBoxGuestAdditions_4.3.11-93070.iso
sudo cp VBoxGuestAdditions_4.3.11-93070.iso /Applications/VirtualBox.app/Contents/MacOS/VBoxGuestAdditions.iso
Since the iso is no longer available, you can use the 4.3.12 one (http://dlc.sun.com.edgesuite.net/virtualbox/4.3.12/VBoxGuestAdditions_4.3.12.iso)
note : the binary vbox4.3.12 for os X is not available at this time