I am trying to run the OS found on the Pi-Top in VirtualBox (the OS can be downloaded here https://www.pi-top.com/products/os). However, said OS is available only in a .zip format, which then unpacks into a .img, which cannot be opened in VirtualBox.
I have tried using the steps outlined here (How to create a virtual machine from a .img disk image?) but to no avail; it always fails to find a bootable medium.
I have tried using IMGtoISO, but that also fails. I recently tried mounting the OS in windows 10, but that gave me the error "disk image file is corrupted." The thing is, I know the img does actually work; I have used it to flash SD cards with the OS numerous times, and it always boots on the pi-tops themselves whenever I then power them on. The OS runs with (relatively) few problems on the pi-tops, but I cannot get it to run in a VM.
I'm sure I'm doing something wrong or misunderstanding the file types involved (I am relatively new to using VMs, I will admit), but I can't figure out what to do.
All help would be appreciated.