Struggling to download Bootcamp on iMac w/ High Sierra

I have downloaded the ISO file of Windows 10 but every time I start up the Boot Camp Assistant, it say "The installer disc could not be found." I want to download Boot Camp into my internal flash drive. I have 2 flash storages in this computer 250 GB flash storage and a 1 TB SATA disk. How can I download Boot Camp into my SATA disk without having to use an external drives?

iMac 21.5", macOS 10.13

Posted on Apr 7, 2020 11:28 AM

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Posted on Apr 11, 2020 5:55 AM

macOS High Sierra does not correctly handle W10 1903 and later ISOs, due to a large install.wim (4+GB).


macOS Mojave 10.14.x does, after the following patches, depending on your Mojave version.


Download macOS Mojave 10.14.5 Boot Camp Update

Download macOS Mojave 10.14.6 Combo Update


Do you want to consider upgrading to Mojave? If you cannot upgrade, look for an ISO older than W10 1903.

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Question marked as Top-ranking reply

Apr 11, 2020 5:55 AM in response to derekchai_

macOS High Sierra does not correctly handle W10 1903 and later ISOs, due to a large install.wim (4+GB).


macOS Mojave 10.14.x does, after the following patches, depending on your Mojave version.


Download macOS Mojave 10.14.5 Boot Camp Update

Download macOS Mojave 10.14.6 Combo Update


Do you want to consider upgrading to Mojave? If you cannot upgrade, look for an ISO older than W10 1903.

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Struggling to download Bootcamp on iMac w/ High Sierra

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