Like maximum matters in macOS, Boot Camp normally simply works. Boot Camp Assistant does what it’s speculated to do and both creates or eliminates a partition so you can deployation Windows or repair your Mac to walking most effective macOS. 

However, now and again it is going wrong. In this article, we’ll display you what to do while you see the message ‘The startup disk can’t be partitioned or restored to a unmarried partition’ in Boot Camp Assistant.

What is Boot Camp Assistant?

Boot Camp Assistant is the device in macOS that lets in you to create or take away a partition in your boot disk so you can deployation Windows or repair your Mac and take away Windows. It has been part of macOS because the first Intel Macs and works on each current model of macOS. 

However, the ones with ‘M’-primarily based totally architecture, Apple-silicon Macs, don’t help Boot Camp.

How does Boot Camp Assistant paintings?

It walls your boot disk, setting all of the documents you want to run macOS on one partition and putting in the firmware important to put in Windows on the alternative partition. 

It then walks you thru the manner of putting in Windows. While the manner could be very safe, you ought to continually again up your Mac earlier than walking Boot Camp Assistant, simply in case something is going wrong.

What does the mistake message mean?

If you notice ‘the startup disk can’t be partitioned or restored to a unmarried partition,’ or ‘the disk does now no longer have sufficient area to efficiently partitioned,’ it approach that Boot Camp Assistant is having hassle partitioning or restoring your boot disk to a unmarried partition. Fortunately, there are numerous matters you could do to try to restoration it.

How to restoration troubles in Boot Camp Assistant

1. Free up area in your startup disk

One of the maximum not unusualplace motives for troubles with Boot Camp Assistant is the startup disk does now no longer have sufficient area to be partitioned. 

If you intend to put in Windows 11, Apple recommends you ought to have at the least 64GB of loose area and 128GB for an choicest experience. If you’ve got got an iMac Pro or Mac Pro with 128GB RAM, you may want at the least that tons loose area.

If you’ve got got much less than 64GB loose, you may want to clean area. You can do this through the usage of macOS’ integrated garage optimization or a device designed to loose up area in your Mac like CleanMyMac X.

CleanMyMac X has a System Junk module that removes all of the junk documents sitting in your boot disk. 

These encompass brief documents that weren’t deleted, cache documents, and language help documents for languages you don’t use. Here’s the way to use it.

CleanMyMac X – System junk test complete


  • Download and deployation CleanMyMac in case you don’t have already got it in your Mac.
  • Launch it out of your Applications folder.
  • Choose System Junk at the left-hand sidebar.
  • Press Scan.
  • Choose Clean.

2. Check in case your Mac is walking an up to date model of macOS

Sometimes an improve can restoration the troubles with the Boot Camp Assistant. To take a look at for macOS updates, do the following:


  • Click at the Apple menu and pick About this Mac.
  • Press Software Update.
  • If there’s an replace to be had, deployation it.

3. Repair your boot disk with Disk Utility

If you’re having hassle partitioning the disk, strive walking the First Aid from inside Disk Utility to test for errors.


  • Navigate to Applications > Utilities and double-click on Disk Utility to release it.
  • Select your boot disk — it’s on pinnacle of the listing at the left sidebar.
  • Choose First Aid withinside the toolbar.
  • Press Run.

Then run Boot Camp Assistant again. If it doesn’t paintings and you continue to get the mistake message, strive the stairs below.

4. Check for unallocated loose area


  • Launch Disk Utility.
  • In the sidebar, choose Macintosh HD, or whichever your boot disk is referred to as.
  • Select Partition withinside the toolbar.
  • If you notice a message approximately Apple File System sharing area, click on Partition to affirm you need to partition.
  • If the pie chart has a segment referred to as Free Space, choose it.
  • Press the ‘-‘ button to take away the unallocated loose area and make it to be had for use.
  • Press Apply and cease Disk Utility.
  • Try walking Boot Camp Assistant again.

If you continue to get a message announcing your disk couldn’t be partitioned, strive turning off Time Machine backups withinside the Time Machine pane in System Preferences.

There are numerous motives you could run into troubles while you try and run Boot Camp Assistant. One of the maximum not unusualplace is that there isn’t sufficient area in your boot disk or that there’s unallocated loose area. 

If you observe the stairs above, you may restoration the ones troubles and ought to be capable of use Boot Camp efficiently to partition your startup disk.


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