XXX: VirtualBox Guest Additions has been removed since Tails 4.27. Without Guest Additions, the shared folders feature of VirtualBox is unavailable.Until Guest Additions is added back (#18728), the tip below shouldn't be displayed.
In our [[security warnings about virtualization|virtualization#security]] we recommend to run Tails in a virtual machine only if the host operating system is trustworthy.
<p>Microsoft Windows and macOS being proprietary software, they cannot be considered trustworthy. Only run Tails in a virtual machine on Windows or macOS for testing purposes and do not rely on it for security.</p>
<li><p>The <a href="https://www.virtualbox.org/manual/ch04.html#guestadd-intro">shared clipboard</a> feature of <i>VirtualBox</i> is unavailable.</p></li>
<li><p>The screen resolution of Tails can't be changed by resizing the virtual machine window in the host OS. The screen resolution must be changed from inside Tails.</p>