Does not work the clipboard

Why does not work the clipboard between the Whonix-Workstation v.9.4 and Underlying OS?

Used Oracle VM VirtualBox v.4.3.20.

It’s disabled by default. Please see documentation:
https://www.whonix.org/wiki/VirtualBox_Guest_Additions#Clipboard_Sharing

Ok! Thank you very much :slight_smile:

Go to VirtualBox machine settings -> General -> Advanced -> Shared Clipboard -> Bidirectional -> ok.
I tried it. However, it does not work :(

Did you install guest additions beforehand?

Yes:
Oracle_VM_VirtualBox_Extension_Pack-4.3.20-96996.vbox-extpack

Extension pack is not the same as guest additions. Extension pack is not required for clipboard sharing. You need guest additions. See:
https://www.whonix.org/wiki/VirtualBox_Guest_Additions