Bootcamp option missing

Question

Level 1

6 points

Bootcamp option missing

Hello folks,

I installed bootbamp shortly after receiving this new Macbook Pro a couple months ago, under 10.14. It booted into Windows just fine and since then I haven't tried booting into it again.

The only significant changes I recall doing since then is enabling Filevault and upgrading to 10.14.1. Today I tried booting into bootcamp, and the option is missing (both in the boot options when starting with the option key, and from Startup Disk).

The BOOTCAMP partition still shows up in Disk Utility.

When launching the Boot Camp Assistant I'm getting the message:

The startup disk cannot be partitioned or restored to a single partition.

The startup disk must be formatted as a single Mac OS Extended (Journaled) volume or already partitioned by Boot Camp Assistant for installing Windows.

Any ideas how to get boot camp working again?

MacBook Pro (13-inch, 2018, 4 TBT3), macOS Mojave (10.14.1)

Posted on Nov 4, 2018 8:15 AM

Reply

Answer 1

Best reply

Loner T

Level 9

59,471 points

Nov 11, 2018 6:01 AM in response to Guychi

You already have the disk partitioned. We need to merge disk0s3/disk0s4 into the main partition, and then retry BC Assistant.

In your specific case, try

diskutil eraseVolume jhfs+ BC1 disk0s3

diskutil eraseVolume jhfs+ BC2 disk0s4

diskutil mergePartitions jhfs+ BCMP disk0s3 disk0s4

diskutil list

If you only see disk0s3 as the last disk in diskutil list output, then

diskutil eraseVolume fat32 BOOTCAMP disk0s3

and run BCA and click on Restore/Remove.

Reply

Answer 2

Guychi Author

Level 1

6 points

Nov 4, 2018 11:26 AM in response to Loner T

To clarify: I'm unable to boot into Windows. The BOOTCAMP partition exists but there seems to be no way for me to boot into it.

Reply

Answer 3

Loner T

Level 9

59,471 points

Nov 4, 2018 8:17 AM in response to Guychi

BC Assistant is a Windows Installation helper. Once Windows is installed, it is not needed. If you have Windows Updates enabled, you can get updates which may cause issues, which show up after a reboot.

Reply

Answer 4

Guychi Author

Level 1

6 points

Nov 6, 2018 12:33 PM in response to Loner T

When launching the Boot Camp Assistant I'm getting the message:

The startup disk cannot be partitioned or restored to a single partition.

The startup disk must be formatted as a single Mac OS Extended (Journaled) volume or already partitioned by Boot Camp Assistant for installing Windows.

Reply

Answer 5

Guychi Author

Level 1

6 points

Nov 7, 2018 4:25 PM in response to Loner T

/dev/disk0 (internal):

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme 500.3 GB
disk0

1: EFI EFI 314.6 MB
disk0s1

2: Apple_APFS Container disk1 444.0 GB
disk0s2

3: Microsoft Basic Data OSXRESERVED 8.0 GB disk0s3

4: Microsoft Basic Data BOOTCAMP 48.0 GB disk0s4

/dev/disk1 (synthesized):

#: TYPE NAME SIZE IDENTIFIER

0: APFS Container Scheme - +444.0 GB
disk1

Physical Store disk0s2

1: APFS Volume Macintosh HD 340.8 GB
disk1s1

2: APFS Volume Preboot 43.7 MB disk1s2

3: APFS Volume Recovery 512.8 MB
disk1s3

4: APFS Volume VM 3.2 GB disk1s4

Reply

Answer 6

Loner T

Level 9

59,471 points

Nov 5, 2018 11:27 AM in response to Guychi

If you reboot and hold Alt/Option key, do you see the Windows partition as a selection? Was Windows fully installed?

Reply

Answer 7

Guychi Author

Level 1

6 points

Nov 5, 2018 1:28 PM in response to Loner T

Yes, windows was originally fully installed and booted properly (using the option key to choose it).

No, it currently doesn't appear as a selection, only "Macintosh HD" and the network boot..

Reply

Answer 8

Loner T

Level 9

59,471 points

Nov 5, 2018 7:09 PM in response to Guychi

Your 10.14.1 upgrade updated the EFI partition, which is causing issues. Can you mount the EFI an check if you have a Microsoft directory in the EFI partition?

Reply