Why is bidirectional copy/paste erring?

Question

I am trying to allow for bidirectional copy/pasting between my host MacOS Lion machine and my virtual Ubuntu Unity machine within Virtual box.

Hence, I specified Settings => Advanced => Shared Clipboard to be "Bidirectional." However, I cannot copy/paste from or to my Mac OS or Ubuntu.

Why? Is there something else I must do?

Answer 1

Have you installed the Virtual Box Guest Addtion on the Ubuntu guest VM?

Please refer to this: How do I enable the shared clipboard in VirtualBox?