How do I display the menu bar of VirtualBox?
Functions like cdrom, usb, etc need access to the menu bars to work.
Ubuntu – Why has VirtualBox’s menu disappeared
virtualbox
Related Solutions
You can disable the menu bar. For the setting to take effect you may have to exit and return to fullscreen/seemless mode. No need to shut down the virtual machine first.
Go to the settings of the machine. In "General" on the "Advanced" tab you can select: "Show in Fullscreen/Seamless" and there's an option to "Show At Top Of Screen".
In VirtualBox 5 the setting is under “User Interface” instead of “General”.
You have Scale Mode enabled. Disable it (Right-CTRL + C) and you will see the Devices Menu for your VM. You can then install the Guest Additions
Best Answer
Because you're in scale mode which causes it to be hidden.
Host + C is the toggle for scale mode (where Host is Right Control by default)