Can't install El Capitan in VirtualBox on High Sierra I am installing El Capital in VirtualBox on High Sierra. The reason I am doing this is that I have an enterprise application that stoped working in High Sierra and so I am going the VM route.

When I need to select a disk to install the OS, there is no option for me to choose except the dmg file.



I am guessing that it might be the APFS on my MacBook Pro that is causing the problem but I have no solution. I tried using a USB external drive but it does not appear too after plugging in.

Does anyone have a way around this?
Well I just figured out that you have to click view>all devices in Disk Utility before you can see the virtual drive and format it or install to it!