Locate the "Advanced" features on the left side of the "Virtual Machine Settings" dialog.
It is perfectly possible to install Devuan Linux into an old school BIOS type PC machine
however times have moved onwards. Microsoft has devised a demonic boot feature for modern
computers called UEFI:
UEFI stands for "Unified Extensible Firmware Interface." The UEFI
Specification defines a new model for the interface between
personal-computer operating systems and platform firmware. The
interface consists of data tables that contain platform-related
information, plus boot and runtime service calls that are available
to the operating system and its loader. Together, these provide a
standard environment for booting an operating system and running
pre-boot applications.
That comes directy from the
UEFI.org website.
To be more fair it is a nightmarishly complicated technology that replaces the very old BIOS
world where it was trivial to install nearly anything you wanted on your computer. The new
UEFI makes that process very difficult and often full of hair loss. There is even a feature
called secure boot wherein you must have security keys within your system firmware in order
to boot and run. Do not be concerned as Microsoft is working hard to ensure that your life
will be a living hell if you try to run anything other than Windows. Feel free to read the
description from
VMware :
UEFI Secure Boot is a security standard that helps ensure that your PC
boots using only software that is trusted by the PC manufacturer. For
certain virtual machine hardware versions and operating systems, you
can enable secure boot just as you can for a physical machine.
The virtual machine's default configuration includes several code
signing certificates.
- A Microsoft certificate that is used only for booting Windows.
- A Microsoft certificate that is used for third-party code that
is signed by Microsoft, such as Linux bootloaders.
- A VMware certificate that is used only for booting ESXi inside
a virtual machine.
Suffice it to say that the largest corporations in the world are working hard to make life
miserable if you try to walk away from them. However linux works great and yes you can use
UEFI in the modern world. So shall we.
The
situation is a mess but workable. Lets plow forwards.
------------- Further Reading ----------------
For further reading please take a weekend and read a detailed article written in 2014 by
Adam Williamson.
I saved a copy from the magnificent and wonderful Internet Archive.