Lost disk to install mac os to
i am trying to install a fresh os and it does not find a disc to install to. I can see in disk utility Apple dik image and under that macos base system both only 2,15Gb and 2.01Gb. How do i get the disk to be seen that it should install mac os to? I have to format and reinstall too send back as a trade in.
iMac 21.5″, macOS 10.15