Bootcamp: how do i unmount the ISO

Question

I get the error: "Your bootable USB drive count not be created. There is not enough space available on the disk" when trying to create a Windows 10 start up usb. I am using the required USB capacity size 16gbI have entered disk utility and unmounted the disk image however when I start the bootcamp process the disk image returns to mounted. People are saying to unmount the iso? How do i do that?

Loner T · Answer

You may have two separate issues.To unmount an image, you can run diskutil eject command, but you will need to now the disk number where the image is mounted.What is the name of the specific W10 ISO you have used? Do not use W10 1809 (October).

Sabdo · Answer

/dev/disk0 (internal, physical):   #:                       TYPE NAME                    SIZE       IDENTIFIER   0:      GUID_partition_scheme                        *500.3 GB disk0   1:                        EFI EFI                     209.7 MB disk0s1   2:                 Apple_APFS Container disk1         500.1 GB disk0s2/dev/disk1 (synthesized):   #:                       TYPE NAME                    SIZE       IDENTIFIER   0:      APFS Container Scheme -                      +500.1 GB disk1                                 Physical Store disk0s2   1:                APFS Volume Macintosh HD            120.9 GB disk1s1   2:                APFS Volume Preboot                 44.7 MB    disk1s2   3:                APFS Volume Recovery                512.8 MB disk1s3   4:                APFS Volume VM                      1.1 GB     disk1s4/dev/disk2 (external, physical):   #:                       TYPE NAME                    SIZE       IDENTIFIER   0:     FDisk_partition_scheme                        *16.0 GB    disk2   1:                 DOS_FAT_32 WININSTALL              16.0 GB    disk2s1/dev/disk3 (disk image):   #:                       TYPE NAME                    SIZE       IDENTIFIER   0:                            CCCOMA_X64FRE_EN-GB... +4.7 GB     disk3

Loner T · Answer

Rundiskutil eject disk3Also, do not use W10 1809, use 1803 instead.

Sabdo · Answer

Hi,Could you talk me through the process to fix the first issue.Yes, I was using October 2018 version I’ll download the Older one

Loner T · Answer

Post the output of diskutil list from macOS Terminal.

Bootcamp: how do i unmount the ISO

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