completes the OS Type and related fields if it can detect the operating system in the ISO. If it cannot detect the OS, then set these according to your OS. For example, if the OS Type is Linux, the OS Variant might be Oracle Linux and the OS Version might be Oracle Linux 8.x (64-bit). The options available for the guest OS are also limited by the host architecture. See for more information.The supported OSs are grouped into types. If you want to install something very unusual that is not listed, select the Other type.
Depending on your selection, will enable or disable certain VM settings that your guest OS may require. This is particularly important for 64-bit guests (see ).