Solus 16:9

[ehowton]

Unlike every other linux distro, Solus cannot yet full utilize VMSVGA display driver under VirtualBox (assume all VBox hosts though this one was specifically running under OSX) and will not display any 16:9 ratios under settings. However, if you deprecate the virtual driver to VBoxSVGA, the "Unknown Monitor" reverts to VBX and your full display settings will appear.