

To hide it and enter exclusive full-screen, press the Ctrl + F keys on your keyboard.

This will make it easier for you to follow. First, download this file which contains the command line for changing the screen resolution.Note that these steps work only for VirtualBox and not any other software like VMware Workstation.
#Macos virtualbox gray screen how to
How to Open macOS VirtualBox VM in Full Screen Not sure where to get started? Do not worry as we’ll be helping you out with that here. To fix this, you’ll need to match the resolution of your virtual machine with the monitor resolution.

Even if you try to maximize the window, the guest OS will not expand to fill up your screen.
#Macos virtualbox gray screen 1080p
Considering most people have at least Full HD 1080p monitors these days, it’d appear as if macOS is running in a small window. When you use VirtualBox to run macOS in a guest environment, the default resolution for the operating system is set to 1024×768.
