Two Windows partitions after installing Boot camp?

***QUICK FIX***

Hi,

I have encountered this issue too. I have a fix for everyone (or at least this is how it worked for me).

So what you have to do is to delete (also shread from trash) the ISO file you downloaded from the microsoft windows page.

You encounter two windows because one is the windows you have installed and the other is the installation file (i believe this was mentioned previously).

So just delete the file once you have partitioned you mac and used the ISO file in Bootcamp, then simply restart the mac and you will notice you have only one windows.

1. Your Windows Installer (OSXRESERVED) should have been deleted, if Windows installation was successful.

2. You have Windows Recovery (disk0s6). Was Windows installation completed successfully?

Hi there Jer2015,

It sounds like you are seeing an extra drive when you hold option and boot your computer, that will start the Windows installation again when selected. That sounds to me like you still have the USB drive plugged in with the ISO installation files on it. All you should need to do is unplug it from the computer and it should no longer be an option.

Thank you for using Apple Support Communities!

Unfortunately that isn't the case. This is actually a bug in OSX Boot Camp. It's still unresolved by Apple. Unfortunately when you install Windows from Boot Camp but uninstall without Boot Camp, it will leave a Windows partition there that you cannot remove.

Exoma wrote:

Unfortunately that isn't the case. This is actually a bug in OSX Boot Camp. It's still unresolved by Apple. Unfortunately when you install Windows from Boot Camp but uninstall without Boot Camp, it will leave a Windows partition there that you cannot remove.

This is not a bug. If you use BCA, the remove must also use BCA, not Disk Utility. This is documented in Boot Camp: Remove Windows from your Mac .

If you have used DU to erase (not remove the partition), reformat it as FAT32 and retry the BCA method as shown in the link.

The partition does not show on Disk Utility anymore so perhaps DU thinks it's been deleted but it hasn't, right?

How do I reformat the partition to FAT32 if it doesn't even show in DU?

From Applications -> Utilities -> Terminal, please post the output of the following commands.

diskutil list

diskutil cs list

sudo gpt -vv -r show /dev/disk0

The "sudo" command will prompt you for your password, which will not be echoed back to you.

Thanks! I got this:

gpt show: /dev/disk0: mediasize=500277790720; sectorsize=512; blocks=977105060

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 977105059

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 180396416 2 GPT part - 53746F72-6167-11AA-AA11-00306543ECAC

180806056 1269536 3 GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC

182075592 1848

182077440 15622144 4 GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7

197699584 2048

197701632 778481664 5 GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7

976183296 921600 6 GPT part - DE94BBA4-06D1-4D40-A16A-BFD50179D6AC

977104896 131

977105027 32 Sec GPT table

977105059 1 Sec GPT header

Not quite sure what I need to do next. I have both OSX and Win10 installed on my computer. I also have an extra Windows option in the boot up that I can choose. I'm trying to get rid of that.

Can you post the output of the two diskutil commands?

diskutil list

/dev/disk0 (internal, physical):

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *500.3 GB disk0

1: EFI EFI 209.7 MB disk0s1

2: Apple_CoreStorage APPLE SSD SM0512G Media 92.4 GB disk0s2

3: Apple_Boot Recovery HD 650.0 MB disk0s3

4: Microsoft Basic Data OSXRESERVED 8.0 GB disk0s4

5: Microsoft Basic Data BOOTCAMP 398.6 GB disk0s5

6: Windows Recovery 471.9 MB disk0s6

/dev/disk1 (internal, virtual):

#: TYPE NAME SIZE IDENTIFIER

0: Apple_HFS APPLE SSD SM0512G M... +92.0 GB disk1

Logical Volume on disk0s2

B14AC65B-D8F6-49E5-B099-603FDF0CEA0D

Unlocked Encrypted

Trying to post the other diskutil command but the Apple forums won't let me. Keeps saying "The message contains invalid characters".

Yup, what happened was I installed the wrong version of Windows first. I then deleted it using DU.

I then used bootcamp to instal the proper version of Windows 10. It installed completely successful.

Can you remove the current Windows installation using BC Assistant and run the steps in Re: failed windows 8.1 installation through bootcamp to backup/erase internal disk/restore from Time Machine and then re-install Windows?

What was the solution in the end ? I have the same problem.

To avoid confusion, can you start a new discussion and post details of your disk configuration?