Windows 10 Boot Camp install won't let me install on BOOTCAMP partition on Mac Pro with SSD drive

PRAM rest did it for me.

I had bookmarked this discussion because I had the problem where I could not install into the bootcamp partition.

I had started from scratch recreating all the partitions from recovery still no dice.

Then I did a PRAM reset and I've been able to go back to windows on bootcamp again after a 5 month break.

Your Fusion drive is incorrect and is causing BC to fail. You have the 1TB HDD as disk0 at index 0, it should be index 1. The SSD must always be index 0, otherwise your OSX performance and Fusion functionality is incorrect. You need to backup OSX, boot into Internet Recovery and rebuild your Fusion drive correctly before attempting a Windows installation.

You have two separate issues.

1. Your 2010 MBP does not support W10 officially. If you want to install it, burn the ISO to a physical DVD and use BC Assistant.

2. Your Mac does not support EFI Boot or installing Windows from a USB which explains the error message. BCA creates an MBR and W10 want to use EFI Boot.

This was the piece I was missing. Loner T got me started with his general information about disk structure and volumes and in particular his instructions on how to rebuild my 3TB Fusion drive, but I still couldn't get Windows 10 installed. I tried many things, even downgrading to Yosemite, but it still wouldn't work. Reset the PRAM and boom! Everything is great now. Thanks to both of you!

Thanks so much, everyone. Resetting PRAM worked for me!

I had installed Bootcamp earlier and uninstalled it a couple months ago. When I went to put it back on (after upgrading to Sierra), I had an issue similar to many others here.

Happy new year 🙂

That's ok. The volume is ok. After an CMD P R its works. Osx and windows 10 are installed.

Still the last probleme (AMD RADEON error ).

Thank you so much

I was trying to do what all the younger kids where doing with there new macs. This it worked like a charm burning the ISO to a DVD and the BCA to the flash drive. Thank you again Loner T.

After disk0s5 has been created and before the installer starts, do you have the ability to run the following command on the disk0s5

diskutil eraseVolume free Free disk0s5

and then select it from the Windows installer.

You may have to time the erase appropriately.

The MSR should be about 128MB. Here is an example of a W8.1 EFI layout.

gpt show: /dev/disk0: mediasize=500277790720; sectorsize=512; blocks=977105060

gpt show: /dev/disk0: PMBR at sector 0

gpt show: /dev/disk0: Pri GPT at sector 1

gpt show: /dev/disk0: Sec GPT at sector 977105059

start size index contents

0 1 PMBR

1 1 Pri GPT header

2 32 Pri GPT table

34 6

40 409600 1 GPT part - C12A7328-F81F-11D2-BA4B-00A0C93EC93B

409640 487712920 2 GPT part - 48465300-0000-11AA-AA11-00306543ECAC

488122560 1269536 3 GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC

489392096 32

489392128 262144 4 GPT part - E3C9E316-0B5C-4DB8-817D-F92DF00215AE

489654272 487450624 5 GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7

977104896 131

977105027 32 Sec GPT table

977105059 1 Sec GPT header

sudo fdisk /dev/disk0

Disk: /dev/disk0 geometry: 60821/255/63 [977105060 sectors]

Signature: 0xAA55

Starting Ending

#: id cyl hd sec - cyl hd sec [ start - size]

------------------------------------------------------------------------

1: EE 1023 254 63 - 1023 254 63 [ 1 - 977105059] <Unknown ID>

2: 00 0 0 0 - 0 0 0 [ 0 - 0] unused

3: 00 0 0 0 - 0 0 0 [ 0 - 0] unused

4: 00 0 0 0 - 0 0 0 [ 0 - 0] unused

Was this message generated after SIP was disabled and installation was retried? If yes, can you check if the main Bootcamp volume shows any files in the OSX Finder? Since it was further along, there should be logs.

I spent whole day trying to solve the problem with either windows 8.1 and windows 10. I managed to install windows 8.1 once, but I run into some issues after upgrading to windows 10 and decided for clean reinstall. Since then, it never worked. I even ended up formatting swap EFI accidentally so I wiped whole fusion drive and reinstalled el captain from the internet ...twice. Once myself, second time with support on another computer's chat.

Few highlights from windows 64-bit installer (both 8.1 or 10):

0) Boot Camp Assistant 6.0.0 (519), El Capitan 10.11.1, iMac late 2015, 2GB fusion

1) Windows can't install on partition prepared by Boot Camp ("Windows can't be installed on drive 0 partition 5. (Show details)" "Windows cannot be installed to this hard disk space. Windows must be installed to a partition formatted as NTFS.")

2) When I selected BOOTCAMP partition and did Format (alt+f), Next button became enabled, but when pressed I got different error ("We couldn't create a new partition or locate an existing one. For more information, see the Setup log files.")

3) Deleting partition and creating new one automatically creates 4 partitions, (error from 2) remains)

4) If you decide return to mac and undo action with boot camp assistant, first remove all automatically generated partitions by windows installer (in 3) or you won't be able to revert without fdisk (some bootcamp assistant error)

5) When you do run boot camp assistant again (after 3) and 4), it displays primary partition smaller and offers you another install (like you lost some space), just proceed and when you'll be able, cancel (stop button). It'll revert your partition to original state and full size.

6) If you choose another approach and just delete BOOTCAMP partition from MS installer and press next without creating New partitions, you'll get one step closer. 4 partitions create without telling you, you'll get to next screen with "Copying Windows files (0%)" but after 10s another error: "Windows detected that the EFI system partition was formatted as NTFS. Format the EFI system partition as FAT32, and restart the installation."

7) Regarding 6): DON'T ever touch any mac or swap partitions via windows installer, NTFS error is ********, you'll end up repartitioning reformatting whole disc if you listen to MS

Now I should find a way how to create MS10 bootable flash drive I suggest...

BobMcKenzie wrote:

Hello,

please watch the video from Plysovej_Katktus.
I have the same Problem.

this is the screen after i format the Bootcamp Partition.

in englisch it means. "can't make a new Partition or find a Partition"

How do you have a 483Gb Drive 0? Standard Fusion is 120Gb SSD + 1/2/3TB HDD. Please post the output of diskutil list and diskutil cs list from OSX Terminal.

Edit: Based on what Loner T just wrote, this howto may be incorrect !!!

By the way, when someone realises to mess fusion drive partitions, there is a way how to revert everything to original state. Following steps worked for me (late 2015 iMac 2TB fusion). You will LOOSE EVERY DATA ON OUR MAC so backup first!

0) delete any partitions previously created by Windows installation or boot camp assistant if any

1) cmd+r on boot after boot-up sound, for 4 secs, recovery screen appears after minute

2) Top bar -> Utilities -> Terminal

3) diskutil cs list

4) select and copy logical volume ID at the top (in my case it was 50FBAD7C-8655-43F2-8B85-E60DDA4A5894 )

5) diskutil cs delete <paste logical volume ID>

example: diskutil cs delete 50FBAD7C-8655-43F2-8B85-E60DDA4A5894

6) last output should be "Finished CoreStorage operation"

7) diskutil list

8) You should see that APPLE HDD ST20 location (/dev/disk0 in my case) and APPLE SSD SM01 (/dev/disk1 in my case), use them in correct order in next command as you can see

9) diskutil cs create Macintosh\ HD <HDD> <SSD>

example: diskutil cs create Macintosh\ HD disk0 disk1

10) last output line should be "Finished CoreStorage operation"

11) diskutil cs list

12) select and copy logical volume ID at the top (in my case it was 28EB112E-C9D8-444D-8BAC-7876B768740A )

13) diskutil cs createVolume <paste logical volume ID> jhfs+ Macintosh\ HD 100%

example: diskutil cs createVolume 28EB112E-C9D8-444D-8BAC-7876B768740A jhfs+ Macintosh\ HD 100%

14) close terminal (corner red X button, when I did different approach by typing exit, recovery menu didn't recover)

15) choose Disk Utility from recovery list

16) you should see Fusion drive with macintosh HD only

17) close Disk Utility (corner red X button)

18) chose Reinstall OS X

19) follow reinstall steps

Did you install windows 10?

downloaded here? https://www.microsoft.com/en-gb/software-download/windows10ISO

partitioned with boot camp assistant 6.0.0 (519)?

just formatted partition and pressed next?

or different apprach like partitioning via diskutil and used retail windows DVD

...because I've got nothing connected to my mac either.

Can you please boot into Mac and run some disk tests? https://itunes.apple.com/gb/app/blackmagic-disk-speed-test/id425264550?mt=12

What results does this give to you? (referring to order of SSD/HDD as discussed previously here)

disk0s1: EFI 200MB

disk0s2: Mac 1.5TB

disk0s3: Mac Recovery 619MB

BC created:

disk0s4: OSXRESERVED 7.4GB

Windows 10 installer automatically created from 324GB unallocated space:

disk0s5: Recovery 450MB (433MB free)

disk0s6: System 100MB (95MB free)

disk0s7: MSR 16MB (16MB free)

disk0s8: Windows 301.8GB

error: "Windows detected that the EFI system partition was formatted as NTFS. Format the EFI system partition as FAT32, and restart the installation."

Is it possible installer doesn't allocate enough space for MSR by accident