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Have you ever come across the “Your disk could not be partitioned” error when trying to install macOS? If so, you’re not alone. This is a common error that can occur for a variety of reasons. In this blog post, we’ll take a look at what causes this error and how you can fix it. We’ll also provide some troubleshooting tips in case you run into this issue again in the future.

Why your disk cannot be partitioned?

There are many reasons why your disk cannot be partitioned. The most common reason is that the disk is corrupt and needs to be repaired. Other reasons include having insufficient free space on the disk, or the disk being too small to be partitioned.

If you are receiving an error message that says your disk cannot be partitioned, the first thing you should do is try to repair the disk. To do this, you can use a utility like Disk Utility or fdisk. If these utilities are not able to repair the disk, then it is likely that the disk is too corrupted to be repaired and you will need to replace it.

If your disk is not corrupt, but you still cannot partition it, then the most likely reason is that there is not enough free space on the disk. In order to partition a disk, there must be at least 10% free space on thedisk. If there is less than 10% free space, you will need to delete some files or programs in order to make more room.

Another possibility is that the disk is too small to be partitioned. This is most often the case with external hard drives or USB flash drives.

How to partition your disk?

If you’re running out of space on your primary hard drive, or just want to keep your operating system and data separate, you can partition your disk. This will create a new volume on your hard drive that you can use to store files. You can partition your disk using the Disk Management tool in Windows or the diskutil command in macOS.

To partition your disk in Windows:

  1. Open the Disk Management tool by pressing Windows+R, typing diskmgmt.msc into the Run dialog, and pressing Enter.
  2. ¬†Find your hard drive in the list of drives in the Disk Management window. Right-click it and select “Shrink Volume.”
  3. Enter the amount of space you want to allocate to the new volume in the Shrink dialog box and click “Shrink.”
  4. Right-click the unallocated space on your hard drive and select “Create Partition.”
  5. Choose whether you want this to be a primary or extended partition and click “Next.” If you’re not sure, choose primary.

What to do if you still cannot partition your disk?

If you still cannot partition your disk after following the instructions in the main article, there are a few things you can try.

First, make sure that you have enough free space on your disk. You need at least 10 GB of free space to create a new partition. If you do not have enough free space, you will need to delete some files or programs to free up space.

Second, try using a different method to partition your disk. If you are using a Windows computer, you can try using the Disk Management tool. This tool is located in the Control Panel. To use this tool, select your disk and then choose the “Create Partition” option.

Third, if you are still having trouble partitioning your disk, you may need to contact a professional for help. A professional can help you partition your disk and ensure that it is done correctly.


There are a number of reasons why your disk could not be partitioned, but the most likely cause is that there is not enough free space on the disk. To fix this, you will need to delete some files or programs that are taking up space on the disk. Once you have done this, you should be able to partition the disk without any problems.