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)
Formatting the HD only touches the existing Fusion drive Macintosh HD.
It may be Greek, but the Greeks learnt it, so can you. 😉.
You are interested in
Use the following steps to recreate the Fusion drive. The SSD must always be first. Verify the disk numbers before you execute the following steps.
- diskutil eraseDisk jhfs+ SSD disk0
- diskutil eraseDisk jhfs+ HDD disk1
- diskutil cs create macOS-LVG disk0s2 disk1s2 (please ensure SSD is first, otherwise you will have performance issues).
- diskutil cs createVolumeUUIDjhfs+"Macintosh HD" 100% (the UUID must be manually entered and is generated in the previous step).
- re-install macOS
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.
I was in Recovery Mode CMD-R
Did you see the last result ?
Why did it fail ?
Mar 10, 2018 3:14 PM in response to Loner T
After diskutil list I did step 1...... no go 😟
diskutil list
/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 110.6 GB 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 (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 disk1s2, disk0s2
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
-bash-3.2# diskutil eraseDisk jhfs+ SSD disk1
Started erase on disk1
Unmounting disk
Error: -69877: Couldn't open device
Do I type command #1 EXACTLY as you have typed it above?
Do I then type command #2 EXACTLY as you have typed it above?
Do I then type command #3 EXACTLY as you have typed it above? (how will I ensure the SSD is first?)
Do I then type command #4 EXACTLY as you have typed it above? ( How will I recognize the UUID from the previous step?)
re-install Mac OS............ is that through a re-boot to recovery mode & choose the re-install option ?
| #: | 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
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.
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
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
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.
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
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.
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
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.
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
This in now what I see after running the commands
-bash-3.2# diskutil unmountDisk disk1
Unmount of all volumes on disk1 was successful
-bash-3.2# gpt add -i 4 -b 1738719208 -s 214805927 -t windows /dev/disk1
/dev/disk1s4 added
-bash-3.2# gpt -vv -r show /dev/disk1
gpt show: /dev/disk1: mediasize=1000204886016; sectorsize=512; blocks=1953525168
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 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 4 GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7
1953525135 32 Sec GPT table
1953525167 1 Sec GPT header
Failed Bootcamp HD partition
