You should not receive the previous error and will be able to run the installation without any hiccup. Now, try running Boot Camp Assistant again to install Windows. Hit Enter and your Mac will restart as usual.

Once that has been completed, type in this code:

That command checks and repairs inconsistencies in file systems that might prevent you from partitioning your drive. Now, type in the following code into the command prompt interface: Then, turn it on and immediately hold down Command + S to enter Single User Mode. Recommended Reading: 20 Handy Mavericks Tips & Tricks You Probably Don’t Knowįirst, you have to shut down your Mac. Fret not, we’ve got a quick and easy way to overcome this error. This error normally happens when you attempt to partition an old hard drive. If you don’t want to proceed with partitioning the disk, click Cancel.Īfter the operation finishes, click Done.Īfter you partition a storage device, an icon for each volume appears in both the Disk Utility sidebar and the Finder sidebar.Getting an error message that says, ' Your disk could not be partitioned' when trying to install Windows with Boot Camp Assistant on your Mac? If you try to partition it manually with Disk Utility, you might also receive a similar error message. If you want to proceed with partitioning the disk, click Continue. If a dialogue appears that indicates it will take a long time to resize the startup volume, read the information in the dialogue, then do one of the following:

Read the information in the Partition Device dialogue, then click Partition. In the Format: field, use the dropdown to select a Format for the. In the Name: field, type a name for your new partition. Type a name for the volume in the Name field.įor MS-DOS (FAT) and ExFAT volumes, the maximum length for the volume name is 11 characters.Ĭlick the Format pop-up menu, then choose a file system format.Įnter the size or drag the resize control to increase or decrease the size of the volume. Click the plus ( +) button below the pie chart. Note: If you click Add Volume instead, you can click the Add button to create an additional APFS volume in the container, or click Cancel to return to the Disk Utility window without making any changes to the storage device.

Partition disk mac