I did a fresh macOS install and wanted to install Windows 10 back but Boot Camp is asking for a USB drive. High Sierra wasn't asking for it as a Windows 10 ISO file was enough. Even if I try to install with a FAT formatted USB drive, I still can not install. I have a default Fusion disk which came with iMac but I’m not using it. I installed a 500 GB SSD.
Trying without USB connected. I wasn't asked for a USB when I was on High Sierra on the same computer. I want to install to 500 GB SSD (macOS container):
Trying with a FAT formatted USB disk:
Also tried the way without Boot Camp as described here but with no luck: https://fgimian.github.io/blog/2016/03/12/installing-windows-10-on-a-mac-without-bootcamp/
Windows detected the EFI system partition was formatted as NTFS. Format the EFI system partition as FAT32, and restart the installation. (Screenshot)
$ diskutil list /dev/disk0 (internal, physical): #: TYPE NAME SIZE IDENTIFIER 0: GUID_partition_scheme *500.1 GB disk0 1: EFI EFI 209.7 MB disk0s1 2: Apple_APFS Container disk1 499.9 GB disk0s2 /dev/disk1 (synthesized): #: TYPE NAME SIZE IDENTIFIER 0: APFS Container Scheme - +499.9 GB disk1 Physical Store disk0s2 1: APFS Volume macos 41.5 GB disk1s1 2: APFS Volume Preboot 44.3 MB disk1s2 3: APFS Volume Recovery 517.0 MB disk1s3 4: APFS Volume VM 2.1 GB disk1s4 /dev/disk2 (internal): #: TYPE NAME SIZE IDENTIFIER 0: GUID_partition_scheme 28.0 GB disk2 1: EFI EFI 314.6 MB disk2s1 2: Apple_HFS apple ssd 27.6 GB disk2s2 /dev/disk3 (external, physical): #: TYPE NAME SIZE IDENTIFIER 0: FDisk_partition_scheme *30.8 GB disk3 1: DOS_FAT_32 WININSTALL 30.8 GB disk3s1