Did not use Bootcamp assistant to remove partition used diskutil now computer still wants to start up in Windows

Question

Level 1

4 points

Did not use Bootcamp assistant to remove partition used diskutil now computer still wants to start up in Windows

Here is what my diskutil list looks like on latest MacBook Pro 2018 - what should I do ? Any assistance would be very welcome - thanks in advance

Owners-MBP:~ owner$ diskutil list

/dev/disk0 (internal):

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme 251.0 GB disk0

1: EFI EFI 314.6 MB disk0s1

2: Apple_APFS Container disk1 250.7 GB disk0s2

/dev/disk1 (synthesized):

#: TYPE NAME SIZE IDENTIFIER

0: APFS Container Scheme - +250.7 GB disk1

Physical Store disk0s2

1: APFS Volume Macintosh HD 21.1 GB disk1s1

2: APFS Volume Preboot 44.3 MB disk1s2

3: APFS Volume Recovery 517.0 MB disk1s3

4: APFS Volume VM 1.1 GB disk1s4

MacBook Pro 13”, macOS 10.14

Posted on Apr 5, 2019 2:09 PM

Reply

Answer 1

Loner T

Level 9

59,536 points

Apr 6, 2019 3:15 PM in response to frji58

frji58 wrote:

OK if I understand, you are saying I can expand the EFI directory in finder, then just simply delete the Microsoft directory. Currently EFI has an APPLE directory, a Boot directory and a Microsoft.

Good.

So just right click and move to trash will fix it?

Yes. Please ensure that you only remove the Microsoft directory, nothing else, otherwise you will run into new issues.

Reply

Answer 2

Loner T

Level 9

59,536 points

Apr 5, 2019 6:33 PM in response to frji58

You have a Microsoft directory in the EFI partition (disk0s1), which must be removed to stop the firmware from scanning the EFI partition for all available system.

Reply

Answer 3

Loner T

Level 9

59,536 points

Apr 6, 2019 12:16 PM in response to frji58

frji58 wrote:

I can see the EFI partition in macOS Finder. If I run diskutil app (not on terminal) it does not show, which seems strange.

Good.

Anyway can I just delete it in the finder? Or what is the next step to get rid of EFI partition? I tried some suggestion I found but that did nothing.

We do not remove the EFI partition, otherwise it causes problems with macOS. We only need to remove the Microsoft directory in the EFI partition. We do not touch anything else.

Reply

Answer 4

frji58 Author

Level 1

4 points

Apr 5, 2019 8:23 PM in response to Loner T

Thanks Loner T for the tip, I googled and found how to delete, but I'm getting an error on mounting the directory or file? I did an ls command to show directories not sure if that is relevant - tried to create the volumes/efi directory again says it already exists. Any ideas as to what I am doing wrong?

Owners-MBP:~ owner$ ls

Desktop Downloads Movies Pictures

Documents Library Music Public

Owners-MBP:~ owner$ sudo mount -t msdos /dev/disk0s1 Volumes/efi

Password:

mount: realpath /Users/owner/Volumes: No such file or directory

Owners-MBP:~ owner$ sudo mkdir /Volumes/efi

mkdir: /Volumes/efi: File exists

Reply

Answer 5

frji58 Author

Level 1

4 points

Apr 6, 2019 11:50 AM in response to Loner T

I can see the EFI partition in macOS Finder. If I run diskutil app (not on terminal) it does not show, which seems strange.

Anyway can I just delete it in the finder? Or what is the next step to get rid of EFI partition? I tried some suggestion I found but that did nothing.

Thanks again

Reply

Answer 6

frji58 Author

Level 1

4 points

Apr 6, 2019 2:30 PM in response to Loner T

OK if I understand, you are saying I can expand the EFI directory in finder, then just simply delete the Microsoft directory. Currently EFI has an APPLE directory, a Boot directory and a Microsoft.

So just right click and move to trash will fix it?

Reply

Answer 7

Loner T

Level 9

59,536 points

Apr 6, 2019 3:56 PM in response to frji58

Boot into Internet Recovery, erase the APPLE SSD AP0256M Media 251 GB.

Now you can install and upgrade to the desired version.

Reply

Answer 8

frji58 Author

Level 1

4 points

Apr 6, 2019 4:43 PM in response to Loner T

Thanks again you are awesome !

Reply

Answer 9

Loner T

Level 9

59,536 points

Apr 6, 2019 4:48 PM in response to frji58

If you run into any issues, please post back.

Reply

Answer 10

frji58 Author

Level 1

4 points

Apr 6, 2019 3:32 PM in response to Loner T

Loner T I did that and was worried for a bit, would not restart, but then I tried the command + option + P + R trick and it finally restarted! Looks like that worked! Thanks again so much!!!

Now I want to reset, in Disk Utility I see APPLE SSD AP0256M Media 251 GB - under that is Container disk1 and under that is Macintosh HD - if possible I want to reset it like a brand new Macbook Pro.

Container disk1 map shows 1.07 GB VM in blue color, 28.32 GB Macintosh HD in red color, 706.5 MB Not Mounted and 220.58 GB free.

when I click on the Mackintosh HD on the left hand side where it lists everything the picture goes blue and says 28.32 GB used.

In disk utility the only option to erase is if I click on the top level for APPLE SSD APO256M Media.

Is that OK, create a USB with Mojave, then erase the whole disk?

Thanks again and regards,

Michael

Reply

Answer 11

Loner T

Level 9

59,536 points

Apr 6, 2019 6:30 AM in response to frji58

Run

sudo diskutil mount disk0s1

and check if the EFI partition shows up in macOS Finder.

Reply

Did not use Bootcamp assistant to remove partition used diskutil now computer still wants to start up in Windows

Similar questions