Installing win 10 on Mojave not possible

Question

Installing win 10 on Mojave not possible

Running bootcamp I got an error message 'Your bootable USB drive could not be created, there is not enough space"

Dirve is 64 GB hence big enough

If I do a manual copy in finder I get the error that the file is to big.

The iso image from Microsoft is 5 GB (win10 64 bit) hence to big for a FAT formatted drive.

The first thing Bootcamp does is formatting the drive to FAT

Looks like it is totally impossible to install Win 10 on Mojave.

iMac (21.5-inch, Late 2012), iOS 12.1, Mojave

Posted on Nov 24, 2018 4:04 AM

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Answer 1

Best reply

Loner T

Level 9

59,471 points

Nov 24, 2018 12:53 PM in response to AardappelAnders

If you are using a USB3 device as a Windows installer, it will not work. You need a USB2 Flash drive of 8+ GB.

Can you disconnect all external storage, run a SMC and NVRAM Reset, and retry the Windows icon?

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Answer 2

Loner T

Level 9

59,471 points

Nov 24, 2018 6:37 AM in response to AardappelAnders

The ISO should be on your Mac's internal disk, not on a USB. Use a W10 1803 (April) or older ISO, because W10 1809 has problems. On 2012-2014 Macs, you need a USB2 Flash drive.

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Answer 3

Nov 24, 2018 8:38 AM in response to Loner T

Thanks

Will try the april version

It is a late 2012 iMac

The iso is on the HD in downloads

Do I need to move it to the Bootcamp partion?

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Answer 4

Loner T

Level 9

59,471 points

Nov 24, 2018 8:54 AM in response to AardappelAnders

ISO in Downloads will cause problems. Move it to Desktop or Documents.

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Answer 5

Nov 24, 2018 9:13 AM in response to Loner T

After making a portion in Bootcamp, it boots in Windows

Try to install but Win says it is a MBR partition and it can only be installed on a GPT disk (EFI)

How can I create an GPT ?

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Answer 6

Loner T

Level 9

59,471 points

Nov 24, 2018 9:18 AM in response to AardappelAnders

A 2012 Mac does not support EFI. If you reboot and hold Alt/Option, from the USB installer, do you see two icons Windows and EFI Boot?

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Answer 7

Nov 24, 2018 9:23 AM in response to Loner T

Yes

if I use "windows" the system hangs

if I use "EFI" win starts to boot, get the partitions but then it complains about being MBR instead of EFI

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Answer 8

Nov 24, 2018 12:55 PM in response to Loner T

Hero!!!

The reset solved it

Choose the Win instead of the EFI and the installation worked

🙂

1000 x thanks!

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Answer 9

Loner T

Level 9

59,471 points

Nov 24, 2018 1:38 PM in response to AardappelAnders

Excellent.

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Installing win 10 on Mojave not possible

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