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Boot Camp Error Solved “The Startup Disk Cannot Be Partitioned Or Restored To A Single Partition”

BootCamp is the utility in your Mac that would let you have your own Windows installed in it. The program helps you switch between the MacOs and Windows whenever you feel like it. All you have to do is download your own Windows 10 and then let BootCamp walk you through the entire installation process.

While this has been convenient to most users, there has been some that reported that this utility has its own issues that needed to be dealt with. According to some users, whenever they tried to use, install, or even remove the Windows program, an error message would flash on their screen.

That’s the common error message that a lot of users have reported to receive and there’s a simple way to get past the problem. Here’s what you have to do.

But do note that before you try fixing the problem and try out anything to do so, have a full backup of your macOS. You can use Time Machine to back it up but also do not that Windows will not be backup if you do this.

The article below will help you fix and troubleshoot the program.

Boot Camp Error Fix

Before you try out anything, do check out for new updates first. Chances are, your software hasn’t been up to date and the outdated system that’s running it is causing the trouble to your computer. Log on your Mac and then go to the Apple Menu and check the System Preference and then select Software Update.

But if it’s not the outdated software system and if the problem continues to persist then to fix it, launch the Terminal App which can be found in your Applications > Utilities > Terminal. Type in the following commands and then hit enter:

diskutil list
diskutil cs list

You will get this kind of results after hitting the command:

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme 251.0 GB disk0
1: EFI EFI 314.6 MB disk0s1
2: Apple_CoreStorage Macintosh HD 201.3 GB disk0s2
3: Apple_Boot Recovery HD 650.0 MB disk0s3
4: Apple_HFS BOOTCAMP 40.6 GB disk0s4

/dev/disk1 (internal, virtual):
#: TYPE NAME SIZE IDENTIFIER
0: Apple_HFS Macintosh HD +201.0 GB disk1
Logical Volume on disk0s2
7D769077-39D6-4422-B73D-101B2C819B29
Unlocked Encrypted

Number 4 indicates the Boot Camp. So in Terminal, type up the following command and then run the Boot Camp assistant.

diskutil eraseVolume fat32 BOOTCAMP disk0s4

This will be what you will see right after that command was entered:

#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *500.3 GB disk0
1: EFI EFI 209.7 MB disk0s1
2: Apple_APFS Container disk1 414.4 GB disk0s2
3: Microsoft Basic Data BOOTCAMP 84.6 GB disk0s3
4: Windows Recovery 471.9 MB disk0s4

/dev/disk1 (synthesized):
#: TYPE NAME SIZE IDENTIFIER
0: APFS Container Scheme – +414.4 GB disk1
Physical Store disk0s2
1: APFS Volume Macintosh HD 240.1 GB disk1s1
2: APFS Volume Preboot 22.5 MB disk1s2
3: APFS Volume Recovery 506.6 MB disk1s3
4: APFS Volume VM 2.1 GB disk1s4

/dev/disk2 (disk image):
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme +996.8 GB disk2
1: EFI EFI 209.7 MB disk2s1
2: Apple_HFS Cópias de segurança … 996.4 GB disk2s2

In the numbers 3 and 4, it indicates the Microsoft Data. Enter the following command in Terminal command:

diskutil eraseVolume jhfs+ BC1 disk0s3
diskutil eraseVolume jhfs+ BC2 disk0s4
diskutil mergePartitions jhfs+ BCMP disk0s3 disk0s4
diskutil list

After this command, you will only see disk0s3. Enter this command next:

diskutil eraseVolume fat32 BOOTCAMP disk0s3

This is what you will see next after seeing three disks related to Windows Data:

/dev/disk0 (internal):
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme 121.3 GB disk0
1: EFI EFI 314.6 MB disk0s1
2: Apple_APFS Container disk1 71.0 GB disk0s2
3: Microsoft Reserved 16.8 MB disk0s3
4: Microsoft Basic Data BOOTCAMP 48.9 GB disk0s4
5: Windows Recovery 470.8 MB disk0s5

/dev/disk1 (synthesized):
#: TYPE NAME SIZE IDENTIFIER
0: APFS Container Scheme – +71.0 GB disk1
Physical Store disk0s2
1: APFS Volume Macintosh HD 62.2 GB disk1s1
2: APFS Volume Preboot 19.6 MB disk1s2
3: APFS Volume Recovery 506.6 MB disk1s3
4: APFS Volume VM 2.1 GB disk1s4

Diskos3, diskos4 and diskos5 are your Windows Data. If you see it, then enter the following commands to Terminal:

diskutil eraseVolume jhfs+ BC1 disk0s3
diskutil eraseVolume jhfs+ BC2 disk0s4
diskutil eraseVolume jhfs+ BC3 disk0s5
diskutil mergePartitions jhfs+ BCMP disk0s3 disk0s5
diskutil list

You will now only see disk0s3 after entering the command to Terminal. If that’s the case, then enter this next command:

diskutil eraseVolume fat32 BOOTCAMP disk0s3

Right after all of that is finished, run Boot Camp again and see if the issue has been fixed.

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