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Boot Camp Assistant stuck loading at around 40%

I've recently decided to use windows on my mac, so this is my first time using windows.

Basic details:

Computer: iMac Retina 4k, 21.5-inch, Late 2015

Windows Version: Windows 10 64bit ISO file from the Microsoft website

I copied the Windows ISO onto a 16gb USB then deleted the one downloaded on my computer

At one point through installation, my iMac turned off, displaying a black screen with my cursor on load. It was stuck like this for around 40 Minuets, until I was presented with the login screen. Everything is back to normal, however my Bootcamp assistant is stuck, and will not load any further than around 40% (The text above displays "Partitioning disk...").

Right now I'm unsure If I should quit bootcamp and start again, just in case something goes wrong.

What should I do?

iMac, macOS High Sierra (10.13.6)

Posted on Aug 31, 2018 6:10 AM

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7 replies

Aug 31, 2018 6:54 AM in response to Loner T

Just Quit Boot Camp.

What When I go Back on Bootcamp, Mac OS is now taking up the space that i formerly dedicated to windows.

I can still slide the windows bar, however it displays negative storage space on Mac OS

(I removed my name from the ISO Image on purpose)

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Level 9

59,471 points

Aug 31, 2018 6:18 AM in response to Tavish Degroot

Tavish Degroot wrote:

I copied the Windows ISO onto a 16gb USB then deleted the one downloaded on my computer

This will not work. The ISO must be unmounted and should not be in the Downloads folder.

Tavish Degroot wrote:

Right now I'm unsure If I should quit bootcamp and start again, just in case something goes wrong.

What should I do?

You need to quit BCA and cleanup and restart BCA steps again.

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Aug 31, 2018 7:01 AM in response to Loner T

Here:

/dev/disk0 (internal, physical):

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *1.0 TB disk0

1: EFI EFI 209.7 MB disk0s1

2: Apple_HFS Macintosh HD 585.0 GB disk0s2

3: Apple_Boot Recovery HD 650.0 MB disk0s6

4: Microsoft Basic Data OSXRESERVED 8.0 GB disk0s4

5: Microsoft Basic Data BOOTCAMP 406.3 GB disk0s5

/dev/disk1 (external, physical):

#: TYPE NAME SIZE IDENTIFIER

0: ALL PHOTOS *500.1 GB disk1

/dev/disk3 (external, physical):

#: TYPE NAME SIZE IDENTIFIER

0: FDisk_partition_scheme *16.0 GB disk3

1: Windows_FAT_32 XBOX 360 16.0 GB disk3s1

/dev/disk4 (disk image):

#: TYPE NAME SIZE IDENTIFIER

0: CCSA_X64FRE_EN-GB_DV5 +4.2 GB disk4

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Aug 31, 2018 2:57 PM in response to Loner T

Nevermind, I've managed to get windows running after a bit of trial and error. Even so, thank you for your help.

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Level 9

59,471 points

Aug 31, 2018 6:58 AM in response to Tavish Degroot

From macOS Terminal, post the text output of

diskutil list

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Level 9

59,471 points

Aug 31, 2018 9:37 AM in response to Tavish Degroot

Can you reboot and post the output of

diskutil list

to allow the disk slices to be correctly ordered?

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Level 9

59,471 points

Aug 31, 2018 3:46 PM in response to Tavish Degroot

Excellent. Please post back, if you have any issues.

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Boot Camp Assistant stuck loading at around 40%

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