Looks like no one’s replied in a while. To start the conversation again, simply ask a new question.

Question:

Question: Failed Bootcamp HD partition

I just tried to install Windows 10 using Boot Camp assistant. It failed.... possibly because I didn't put the Win ISO on a flash drive. Now my HD won't re-partition. I see that "Lonestar" helped someone else & was hoping I could get assistance too. Thanks


High Sierra 10.13.3

iMac (Retina 5K, 27-inch, 2017) (Fusion)

4.2 GHz Intel Core i7

32 GB 2400 MHz DDR4

Radeon Pro 575 4 GB

MacBook Pro 17, Mac OS X (10.4.10)

Posted on

Reply
Question marked as Solved
Answer:
Answer:

SidiBombay wrote:


It looks like I am back up & running. There are still one or two niggly things that will work themselves out, but at least I'm functional again. A BIG thank you !

Excellent.



One last question..... can I install/run Bootcamp/Win10 from an external that has been formatted for Windows (NTFS?)

It is not officially supported by Apple. You can experiment, but be aware that it may or may not work.

Posted on

Page content loaded

Mar 9, 2018 9:32 AM in response to Loner T In response to Loner T

#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme 28.0 GB disk0
1: EFI EFI 314.6 MB disk0s1
2: Apple_CoreStorage Macintosh HD 27.6 GB disk0s2
3: Apple_Boot Boot OS X 134.2 MB disk0s3


/dev/disk1 (internal, physical):

#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *1.0 TB disk1
1: EFI EFI 209.7 MB disk1s1
2: Apple_CoreStorage Macintosh HD 889.4 GB disk1s2
3: Apple_Boot Recovery HD 650.0 MB disk1s3


/dev/disk2 (internal, virtual):

#: TYPE NAME SIZE IDENTIFIER
0: Apple_HFS iMacDad +916.0 GB disk2
Logical Volume on disk0s2, disk1s2
E94AAFEA-3935-4C9A-B230-C2DFBCBE4D78
Unencrypted Fusion Drive


Thanks for getting back to me so quickly


When I restart my iMac in Recovery mode I see the 100GB "free space" that I had allocated for Boot Camp, but when I go to remove it....... it gives me an error

Mar 9, 2018 9:32 AM

Reply Helpful

Mar 9, 2018 10:09 AM in response to SidiBombay In response to SidiBombay

Boot into Local Recovery (Command+R during boot), click on Utilities -> Terminal, and run


csrutil status

csrutil disable

csrutil status


If you see disabled, boot normally and retry the GPT command. This is temporary, and we can re-enable SIP once we finish cleanup.

Mar 9, 2018 10:09 AM

Reply Helpful

Mar 9, 2018 11:07 AM in response to Loner T In response to Loner T

sudo gpt -vv -r show /dev/disk1

Password:

gpt show: /dev/disk1: mediasize=28000002048; sectorsize=4096; blocks=6835938

gpt show: /dev/disk1: PMBR at sector 0

gpt show: /dev/disk1: Pri GPT at sector 1

gpt show: /dev/disk1: Sec GPT at sector 6835937

start size index contents

0 1 PMBR

1 1 Pri GPT header

2 4 Pri GPT table

6 76800 1 GPT part - C12A7328-F81F-11D2-BA4B-00A0C93EC93B

76806 6726359 2 GPT part - 53746F72-6167-11AA-AA11-00306543ECAC

6803165 32768 3 GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC

6835933 4 Sec GPT table

6835937 1 Sec GPT header

Mar 9, 2018 11:07 AM

Reply Helpful

Mar 9, 2018 11:16 AM in response to Loner T In response to Loner T

gpt show: /dev/disk0: mediasize=1000204886016; sectorsize=512; blocks=1953525168

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 1953525167

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 1737040032 2 GPT part - 53746F72-6167-11AA-AA11-00306543ECAC

1737449672 1269536 3 GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC

1738719208 214805927

1953525135 32 Sec GPT table

1953525167 1 Sec GPT header

Mar 9, 2018 11:16 AM

Reply Helpful

Mar 9, 2018 12:52 PM in response to SidiBombay In response to SidiBombay

Notice the entry after GPT3. It is free space. We need to correct this in Internet Recovery -> Utilities -> Terminal.


Run diskutil list and find out the disk number for the 1TB then modify the following commands to use the appropriate value of 'N'.


diskutil unmountDisk diskN

gpt add -i 4 -b 1738719208 -s 214805927 -t windows /dev/diskN

gpt -vv -r show /dev/diskN

diskutil repairDisk disk0


If you do not see any repair issues, then boot normally, re-run BCA and try to remove/restore the partition.

Mar 9, 2018 12:52 PM

Reply Helpful

Mar 9, 2018 1:06 PM in response to Loner T In response to Loner T

Sorry, I don't know what I am doing... you really will have to hold my hand here 🙂

This is the result of "diskutil list"

Please could you type exactly what I am to enter into the terminal app.


/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_CoreStorage Macintosh HD 889.4 GB disk0s2

3: Apple_Boot Recovery HD 650.0 MB disk0s3


/dev/disk1 (internal):

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme 28.0 GB disk1

1: EFI EFI 314.6 MB disk1s1

2: Apple_CoreStorage Macintosh HD 27.6 GB disk1s2

3: Apple_Boot Boot OS X 134.2 MB disk1s3


/dev/disk2 (internal, virtual):

#: TYPE NAME SIZE IDENTIFIER

0: Apple_HFS iMacDad +916.0 GB disk2

Logical Volume on disk1s2, disk0s2

E94AAFEA-3935-4C9A-B230-C2DFBCBE4D78

Unencrypted Fusion Drive


/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_CoreStorage Macintosh HD 889.4 GB disk0s2

3: Apple_Boot Recovery HD 650.0 MB disk0s3


/dev/disk1 (internal):

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme 28.0 GB disk1

1: EFI EFI 314.6 MB disk1s1

2: Apple_CoreStorage Macintosh HD 27.6 GB disk1s2

3: Apple_Boot Boot OS X 134.2 MB disk1s3


/dev/disk2 (internal, virtual):

#: TYPE NAME SIZE IDENTIFIER

0: Apple_HFS iMacDad +916.0 GB disk2

Logical Volume on disk1s2, disk0s2

E94AAFEA-3935-4C9A-B230-C2DFBCBE4D78

Unencrypted Fusion Drive

Mar 9, 2018 1:06 PM

Reply Helpful

Mar 9, 2018 1:15 PM in response to SidiBombay In response to SidiBombay

Reboot and hold Command+Opt+R and click on Utilities -> Terminal, and run


diskutil list


Select and Copy (Command+C) the output, quit Terminal, start Safari (Get Help Online), and Paste (Command+V) the copied output as a reply to this discussion, and then we can go to next step.

Mar 9, 2018 1:15 PM

Reply Helpful

Mar 9, 2018 1:46 PM in response to Loner T In response to Loner T

All was fine until I connected to Safari & then I didn't have access to the link to this discussion. So I saved the terminal output & rebooted as normal. Here is the saved Terminal output. For the next step will I have to reboot into Internet Recovery?


diskutil list

/dev/disk0 (internal):

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme 28.0 GB disk0

1: EFI EFI 314.6 MB disk0s1

2: Apple_CoreStorage Macintosh HD 27.6 GB disk0s2

3: Apple_Boot Boot OS X 134.2 MB disk0s3


/dev/disk1 (internal, physical):

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *1.0 TB disk1

1: EFI EFI 209.7 MB disk1s1

2: Apple_CoreStorage Macintosh HD 889.4 GB disk1s2

3: Apple_Boot Recovery HD 650.0 MB disk1s3


/dev/disk2 (disk image):

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme +2.1 GB disk2

1: Apple_HFS OS X Base System 2.0 GB disk2s1


/dev/disk3 (internal, virtual):

#: TYPE NAME SIZE IDENTIFIER

0: Apple_HFS iMacDad +916.0 GB disk3

Logical Volume on disk0s2, disk1s2

E94AAFEA-3935-4C9A-B230-C2DFBCBE4D78

Unencrypted Fusion Drive


/dev/disk4 (disk image):

#: TYPE NAME SIZE IDENTIFIER

0: untitled +5.2 MB disk4


/dev/disk5 (disk image):

#: TYPE NAME SIZE IDENTIFIER

0: untitled +524.3 KB disk5


/dev/disk6 (disk image):

#: TYPE NAME SIZE IDENTIFIER

0: untitled +524.3 KB disk6


/dev/disk7 (disk image):

#: TYPE NAME SIZE IDENTIFIER

0: untitled +524.3 KB disk7


/dev/disk8 (disk image):

#: TYPE NAME SIZE IDENTIFIER

0: untitled +2.1 MB disk8


/dev/disk9 (disk image):

#: TYPE NAME SIZE IDENTIFIER

0: untitled +524.3 KB disk9


/dev/disk10 (disk image):

#: TYPE NAME SIZE IDENTIFIER

0: untitled +524.3 KB disk10


/dev/disk11 (disk image):

#: TYPE NAME SIZE IDENTIFIER

0: untitled +12.6 MB disk11


/dev/disk12 (disk image):

#: TYPE NAME SIZE IDENTIFIER

0: untitled +2.1 MB disk12


/dev/disk13 (disk image):

#: TYPE NAME SIZE IDENTIFIER

0: untitled +1.0 MB disk13


/dev/disk14 (disk image):

#: TYPE NAME SIZE IDENTIFIER

0: untitled +2.1 MB disk14


/dev/disk15 (disk image):

#: TYPE NAME SIZE IDENTIFIER

0: untitled +524.3 KB disk15


/dev/disk16 (disk image):

#: TYPE NAME SIZE IDENTIFIER

0: untitled +524.3 KB disk16


/dev/disk17 (disk image):

#: TYPE NAME SIZE IDENTIFIER

0: untitled +1.0 MB disk17


/dev/disk18 (disk image):

#: TYPE NAME SIZE IDENTIFIER

0: untitled +6.3 MB disk18


/dev/disk19 (disk image):

#: TYPE NAME SIZE IDENTIFIER

0: untitled +6.3 MB disk19


/dev/disk20 (disk image):

#: TYPE NAME SIZE IDENTIFIER

0: untitled +524.3 KB disk20


/dev/disk21 (disk image):

#: TYPE NAME SIZE IDENTIFIER

0: untitled +2.1 MB disk21

Mar 9, 2018 1:46 PM

Reply Helpful

Mar 9, 2018 2:51 PM in response to SidiBombay In response to SidiBombay

Each Reboot renumbers the disks, if Safari in Recovery is a problem, go back to Recovery console, and run


diskutil list


and check which number is a 28GB disk and which one is 1TB. Note it's number and post the value. Stay in Recovery, use a different device (phone, PC) to post a reply to this discussion.

Mar 9, 2018 2:51 PM

Reply Helpful

Mar 9, 2018 3:55 PM in response to Loner T In response to Loner T

I am still in recovery & have managed to get Safari to open the discussion 🙂


diskutil list

/dev/disk0 (internal):

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme 28.0 GB disk0

1: EFI EFI 314.6 MB disk0s1

2: Apple_CoreStorage Macintosh HD 27.6 GB disk0s2

3: Apple_Boot Boot OS X 134.2 MB disk0s3


/dev/disk1 (internal, physical):

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *1.0 TB disk1

1: EFI EFI 209.7 MB disk1s1

2: Apple_CoreStorage Macintosh HD 889.4 GB disk1s2

3: Apple_Boot Recovery HD 650.0 MB disk1s3


/dev/disk2 (disk image):

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme +2.1 GB disk2

1: Apple_HFS OS X Base System 2.0 GB disk2s1


/dev/disk3 (internal, virtual):

#: TYPE NAME SIZE IDENTIFIER

0: Apple_HFS iMacDad +916.0 GB disk3

Logical Volume on disk0s2, disk1s2

E94AAFEA-3935-4C9A-B230-C2DFBCBE4D78

Unencrypted Fusion Drive


/dev/disk4 (disk image):

#: TYPE NAME SIZE IDENTIFIER

0: untitled +5.2 MB disk4


/dev/disk5 (disk image):

#: TYPE NAME SIZE IDENTIFIER

0: untitled +524.3 KB disk5


/dev/disk6 (disk image):

#: TYPE NAME SIZE IDENTIFIER

0: untitled +524.3 KB disk6


/dev/disk7 (disk image):

#: TYPE NAME SIZE IDENTIFIER

0: untitled +524.3 KB disk7


/dev/disk8 (disk image):

#: TYPE NAME SIZE IDENTIFIER

0: untitled +2.1 MB disk8


/dev/disk9 (disk image):

#: TYPE NAME SIZE IDENTIFIER

0: untitled +524.3 KB disk9


/dev/disk10 (disk image):

#: TYPE NAME SIZE IDENTIFIER

0: untitled +524.3 KB disk10


/dev/disk11 (disk image):

#: TYPE NAME SIZE IDENTIFIER

0: untitled +12.6 MB disk11


/dev/disk12 (disk image):

#: TYPE NAME SIZE IDENTIFIER

0: untitled +2.1 MB disk12


/dev/disk13 (disk image):

#: TYPE NAME SIZE IDENTIFIER

0: untitled +1.0 MB disk13


/dev/disk14 (disk image):

#: TYPE NAME SIZE IDENTIFIER

0: untitled +2.1 MB disk14


/dev/disk15 (disk image):

#: TYPE NAME SIZE IDENTIFIER

0: untitled +524.3 KB disk15


/dev/disk16 (disk image):

#: TYPE NAME SIZE IDENTIFIER

0: untitled +524.3 KB disk16


/dev/disk17 (disk image):

#: TYPE NAME SIZE IDENTIFIER

0: untitled +1.0 MB disk17


/dev/disk18 (disk image):

#: TYPE NAME SIZE IDENTIFIER

0: untitled +6.3 MB disk18


/dev/disk19 (disk image):

#: TYPE NAME SIZE IDENTIFIER

0: untitled +6.3 MB disk19


/dev/disk20 (disk image):

#: TYPE NAME SIZE IDENTIFIER

0: untitled +524.3 KB disk20


/dev/disk21 (disk image):

#: TYPE NAME SIZE IDENTIFIER

0: untitled +2.1 MB disk21

Mar 9, 2018 3:55 PM

Reply Helpful
User profile for user: SidiBombay

Question: Failed Bootcamp HD partition