MacOS Mojave Installation cannot proceed on iMac 2014 5k with Boot Camp

Question

MacOS Mojave Installation cannot proceed on iMac 2014 5k with Boot Camp

I have an iMac 27 5k (late 2014) and I am unable to upgrade to MacOS Mojave. When I attempt to upgrade it says Installation cannot proceed with Boot Camp configured. It says I must remove boot camp and lists HT209057 as a reference. This article suggests that only 27-inch iMac 2012 models with 3TB hard drives have this problem but doesn't mention 2014 5k models. I'm afraid if I uninstall boot camp I wouldn't be able to reinstall it again since that what it says about the 2012 iMac.

Is there a work-around for upgrading to Mojave other than uninstalling boot camp?

iMac with Retina 5K display, macOS High Sierra (10.13.6), null

Posted on Sep 24, 2018 5:13 PM

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Answer 1

Sep 25, 2018 4:28 AM in response to Loner T

diskutil list:

/dev/disk0 (internal, physical):

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *3.0 TB disk0

1: EFI EFI 209.7 MB disk0s1

2: Apple_CoreStorage Macintosh HD 1.2 TB disk0s2

3: Apple_Boot Recovery HD 650.1 MB disk0s3

4: Microsoft Basic Data BOOTCAMP 1.0 TB disk0s4

5: Apple_CoreStorage Macintosh HD 801.4 GB disk0s5

6: Apple_Boot Boot OS X 134.2 MB disk0s6

/dev/disk1 (internal, physical):

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *121.3 GB disk1

1: EFI EFI 209.7 MB disk1s1

2: Apple_CoreStorage Macintosh HD 121.0 GB disk1s2

3: Apple_Boot Boot OS X 134.2 MB disk1s3

/dev/disk2 (internal, virtual):

#: TYPE NAME SIZE IDENTIFIER

0: Apple_HFS Macintosh HD +2.1 TB disk2

Logical Volume on disk1s2, disk0s2, ...

86BDA1A6-2CA8-4436-9B24-E349AC345F9E

Unencrypted Fusion Drive

/dev/disk3 (external, physical):

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *2.0 TB disk3

1: EFI EFI 209.7 MB disk3s1

2: Apple_HFS Padlock DT 2.0 TB disk3s2

/dev/disk4 (disk image):

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme +7.5 GB disk4

1: EFI EFI 209.7 MB disk4s1

2: Apple_HFS InstallESD 7.2 GB disk4s2

diskutil cs list:

CoreStorage logical volume groups (1 found)

|

+-- Logical Volume Group 93F28663-A9C0-4FD1-B7DF-92FF5A8ED1EE

=========================================================

Name: Macintosh HD

Status: Online

Size: 2117140881408 B (2.1 TB)

Free Space: 258048 B (258.0 KB)

|

+-< Physical Volume FC3AE42B-1E5C-4A6E-B119-5E465B61A120

| ----------------------------------------------------

| Index: 0

| Disk: disk1s2

| Status: Online

| Size: 120988852224 B (121.0 GB)

|

+-< Physical Volume 5FB3E05E-BADE-4365-8794-E0C3E73E6617

| ----------------------------------------------------

| Index: 1

| Disk: disk0s2

| Status: Online

| Size: 1194715480064 B (1.2 TB)

|

+-< Physical Volume DB55DEFC-6FA0-4317-8278-F4F6D15AB413

| ----------------------------------------------------

| Index: 2

| Disk: disk0s5

| Status: Online

| Size: 801436549120 B (801.4 GB)

|

+-> Logical Volume Family E02A0B50-6EF8-41E2-BA0F-03B224F7E667

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

Encryption Type: None

|

+-> Logical Volume 86BDA1A6-2CA8-4436-9B24-E349AC345F9E

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

Disk: disk2

Status: Online

Size (Total): 2111000018944 B (2.1 TB)

Revertible: No

LV Name: Macintosh HD

Volume Name: Macintosh HD

Content Hint: Apple_HFS

LVG Type: Fusion, Sparse

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Answer 2

Sep 25, 2018 5:24 PM in response to Loner T

Yes I can do that. I don’t mind removing boot camp if I need to as long as I can set it back up after the upgrade to Mojave. But I definitely don’t want to upgrade if I won’t be able to use boot camp again which is what I’ve seen stated for the 2012 iMac.

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Answer 3

Loner T

Level 9

59,471 points

Sep 25, 2018 5:49 PM in response to CrissyandBill

A 2014 iMac also supports EFI Boot, which does not need the traditional 'sandwich' layout. On non-Fusion drives Mojave can install Windows. Please backup macOS also, in case you need to fall back to the current macOS version.

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Answer 4

Sep 26, 2018 11:03 AM in response to Loner T

I am not familiar with the term sandwich layout. Is this what happens with a default setup of boot camp? How would I do a non sandwich layout? Is that necessary in order to upgrade to Mojave and still be able to install boot camp?

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Answer 5

Loner T

Level 9

59,471 points

Sep 26, 2018 5:40 PM in response to CrissyandBill

CrissyandBill wrote:

diskutil list:

/dev/disk0 (internal, physical):

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *3.0 TB disk0

1: EFI EFI 209.7 MB disk0s1

2: Apple_CoreStorage Macintosh HD 1.2 TB disk0s2

3: Apple_Boot Recovery HD 650.1 MB disk0s3

4: Microsoft Basic Data BOOTCAMP 1.0 TB disk0s4

5: Apple_CoreStorage Macintosh HD 801.4 GB disk0s5

6: Apple_Boot Boot OS X 134.2 MB disk0s6

/dev/disk1 (internal, physical):

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *121.3 GB disk1

1: EFI EFI 209.7 MB disk1s1

2: Apple_CoreStorage Macintosh HD 121.0 GB disk1s2

3: Apple_Boot Boot OS X 134.2 MB disk1s3

/dev/disk2 (internal, virtual):

#: TYPE NAME SIZE IDENTIFIER

0: Apple_HFS Macintosh HD +2.1 TB disk2

Logical Volume on disk1s2, disk0s2, ...

86BDA1A6-2CA8-4436-9B24-E349AC345F9E

Unencrypted Fusion Drive

This layout is where Bootcamp is 'sandwiched' between two disk slices on the same physical disk, used by macOS. This is built specifically for BIOS installation of Windows on a disk larger than 2TB.

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Answer 6

Loner T

Level 9

59,471 points

Sep 26, 2018 5:42 PM in response to CrissyandBill

CrissyandBill wrote:

How would I do a non sandwich layout?

By rebuilding the CS volume, but you must backup all your important Windows files.

CrissyandBill wrote:

Is that necessary in order to upgrade to Mojave and still be able to install boot camp?

There is no other option, if you must have Mojave. You can always stay on the current version of macOS.

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Answer 7

Loner T

Level 9

59,471 points

Sep 26, 2018 5:57 PM in response to CrissyandBill

CrissyandBill wrote:

So if I remove boot camp and repartition the fusion drive to a single partition, then install Mojave I should be able to set boot camp up again correct?

We may need to bypass BC Assistant. Good backups first, then we can rebuild and test. If that does not work, we can fall back to the current configuration.

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Answer 8

Loner T

Level 9

59,471 points

Sep 24, 2018 6:16 PM in response to CrissyandBill

From macOS Terminal, post the output of

diskutil list

diskutil cs list

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Answer 9

Loner T

Level 9

59,471 points

Sep 25, 2018 4:18 PM in response to CrissyandBill

You have a 'sandwich' layout on a 3TB Fusion drive. Do you have a Time Machine backup of macOS and Windows?

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Answer 10

Sep 25, 2018 4:39 PM in response to Loner T

I have a time machine backup of the MacOS going to an external drive but I don’t think it’s backing up Windows.

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Answer 11

Loner T

Level 9

59,471 points

Sep 25, 2018 4:58 PM in response to CrissyandBill

Can you back up Windows a different external drive using Winclone or Windows Backup?

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Answer 12

Sep 26, 2018 5:51 PM in response to Loner T

So if I remove boot camp and repartition the fusion drive to a single partition, then install Mojave I should be able to set boot camp up again correct?

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MacOS Mojave Installation cannot proceed on iMac 2014 5k with Boot Camp

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