Making VirtualBox VM fullscreen on MacOS

Question

I am using MacOS Mojave and have installed VirtualBox VM. My OS in VM is Ubuntu. My problem is that I want my VM machine to be fullscreen. I have tried every method given on stackoverflow but none seems to work.

I have read that

Oracle VM VirtualBox does not provide Guest Additions for Mac OS X at this time.

I found the above statment on https://www.virtualbox.org/manual/ch14.html

Does this mean that fullscreen is not possible?

If there is a way to fullscreen, then kindly let me know.

Edit: Removed Image

Answer 1

It is possible for Guest Ubuntu to get fullscreen in Host Mac. You need to install Guest Additions. You can get them(for virtualbox 6.1) here- Guest Addtions -

Open your Terminal.

    sudo apt-get install virtualbox-guest-utils