I am using the Install macOS Mojave.app
installer on my Mac mini (2018) running Mojave 10.14.5 to install Mojave on a formatted external spinning disk laptop drive (a Toshiba model with case).
I successfully formatted the drive using Disk Utility app in the GUID format.
Now when running the Mojave installer, it refuses to install on the external drive saying:
This Mac can only install macOS on APFS-formatted drives.
But I thought APFS was intended only for solid-state drives, not spinning drives. And there was no APFS option in Disk Utility that I could see.
➥ Is it now impossible to install and boot on an external spinning drive?