Nov 10, 2018 Sometimes it may be necessary to shrink your BOOTCAMP Windows partition and allocate the free space back to the Mac OS partition. Below are the steps I have found to work, but there are other solutions out there too. The nice thing about this solution is that it does not require deleting the BOOTCAMP partition. Stellar Partition Manager V3.0 now resizes Boot Camp partition and allows you to adjust the size(s) of Mac partition and Windows partitions. Use simple drag feature to adjust the sizes of Mac & Windows partition using this Mac partition manager tool. This software supports resizing of. Aug 14, 2017 In addition, if you want to resize Mac Startup hard drive or adjust BootCamp partition on Mac then use the software ‘Create Bootable DMG‘ option to create a bootable media for resizing Mac HD and Windows partition.
What you need to install Windows 10 on Mac
- MacBook introduced in 2015 or later
- MacBook Air introduced in 2012 or later
- MacBook Pro introduced in 2012 or later
- Mac mini introduced in 2012 or later
- iMac introduced in 2012 or later1
- iMac Pro (all models)
- Mac Pro introduced in 2013 or later
The latest macOS updates, which can include updates to Boot Camp Assistant. You will use Boot Camp Assistant to install Windows 10.
64GB or more free storage space on your Mac startup disk:
- Your Mac can have as little as 64GB of free storage space, but at least 128GB of free storage space provides the best experience. Automatic Windows updates require that much space or more.
- If you have an iMac Pro or Mac Pro with 128GB of memory (RAM) or more, your startup disk needs at least as much free storage space as your Mac has memory.2
An external USB flash drive with a storage capacity of 16GB or more, unless you're using a Mac that doesn't need a flash drive to install Windows.
A 64-bit version of Windows 10 Home or Windows 10 Pro on a disk image (ISO) or other installation media. If installing Windows on your Mac for the first time, this must be a full version of Windows, not an upgrade.
- If your copy of Windows came on a USB flash drive, or you have a Windows product key and no installation disc, download a Windows 10 disk image from Microsoft.
- If your copy of Windows came on a DVD, you might need to create a disk image of that DVD.
How to install Windows 10 on Mac
To install Windows, use Boot Camp Assistant, which is included with your Mac.
1. Use Boot Camp Assistant to create a Windows partition
Open Boot Camp Assistant, which is in the Utilities folder of your Applications folder. Then follow the onscreen instructions.
- If you're asked to insert a USB drive, plug your USB flash drive into your Mac. Boot Camp Assistant will use it to create a bootable USB drive for Windows installation.
- When Boot Camp Assistant asks you to set the size of the Windows partition, remember the minimum storage-space requirements in the previous section. Set a partition size that meets your needs, because you can't change its size later.
2. Format the Windows (BOOTCAMP) partition
When Boot Camp Assistant finishes, your Mac restarts to the Windows installer. If the installer asks where to install Windows, select the BOOTCAMP partition and click Format. In most cases, the installer selects and formats the BOOTCAMP partition automatically.
3. Install Windows
Unplug any external devices that aren't necessary during installation. Then click Next and follow the onscreen instructions to begin installing Windows.
4. Use the Boot Camp installer in Windows
After Windows installation completes, your Mac starts up in Windows and opens a ”Welcome to the Boot Camp installer” window. Follow the onscreen instructions to install Boot Camp and Windows support software (drivers). You will be asked to restart when done.
- If the Boot Camp installer never opens, open the Boot Camp installer manually and use it to complete Boot Camp installation.
- If you have an external display connected to a Thunderbolt 3 port on your Mac, the display will be blank (black, gray, or blue) for up to 2 minutes during installation.
How to switch between Windows and macOS
Mac Shrink Boot Camp Partition On Mojave
Restart, then press and hold the Option (or Alt) ⌥ key during startup to switch between Windows and macOS.
Learn more
If you have one of these Mac models using OS X El Capitan 10.11 or later, you don't need a USB flash drive to install Windows:
- MacBook introduced in 2015 or later
- MacBook Air introduced in 2015 or later3
- MacBook Pro introduced in 2015 or later3
- iMac introduced in 2015 or later
- iMac Pro (all models)
- Mac Pro introduced in late 2013
Mac Shrink Boot Camp Partition Failed
To remove Windows from your Mac, use Boot Camp Assistant, not any other utility.
For more information about using Windows on your Mac, open Boot Camp Assistant and click the Open Boot Camp Help button.
1. If you're using an iMac (Retina 5K, 27-inch, Late 2014) or iMac (27-inch, Late 2013) or iMac (27-inch, Late 2012) with a 3TB hard drive and macOS Mojave or later, learn about an alert you might see during installation.
2. For example, if your Mac has 128GB of memory, its startup disk must have at least 128GB of storage space available for Windows. To see how much memory your Mac has, choose Apple menu > About This Mac. To see how much storage space is available, click the Storage tab in the same window.
3. These Mac models were offered with 128GB hard drives as an option. Apple recommends 256GB or larger hard drives so that you can create a Boot Camp partition of at least 128GB.
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Disk Utility User Guide
Partitioning a disk divides it into individual sections, each of which acts as a separate volume.
However, with APFS, you shouldn’t partition your disk in most cases. Instead, create multiple APFS volumes within a single partition. With the flexible space management provided by APFS, you can even install another version of macOS on an APFS volume.
Important: If you’re partitioning your internal physical disk because you want to install Windows, use Boot Camp Assistant instead. Do not use Disk Utility to remove a partition that was created using Boot Camp Assistant. Instead, use Boot Camp Assistant to remove the partition from your Mac.
Add a partition
Important: As a precaution, it’s best to back up your data before creating new partitions on your device.
- In the Disk Utility app on your Mac, select a volume in the sidebar, click the Partition button , then click Partition.Internal storage devices appear below the Internal section in the sidebar. External devices appear below the External section in the sidebar.When you select a volume that already has data on it, the pie chart shows a shaded area representing the amount of data on the volume and an unshaded area representing the amount of free space available for another volume. Disk Utility also shows whether the volume can be removed or resized.Note: If you see a small volume with an asterisk, the partition is smaller than can be represented at the correct scale in the chart.
- Click the Add button .
- Type a name for the volume in the Name field.For MS-DOS (FAT) and ExFAT volumes, the maximum length for the volume name is 11 characters.
- Click the Format pop-up menu, then choose a file system format.
- Enter the size or drag the resize control to increase or decrease the size of the volume.
- Click Apply, click Partition, then click Continue.Click Show Details to view the step-by-step process of creating a new volume.
- After the volumes are created, click Done.
After you partition a storage device, an icon for each volume appears in both the Disk Utility sidebar and the Finder sidebar.
Delete a partition
WARNING: When you delete a volume or partition, all the data on it is erased. Be sure to back up your data before you begin.
- In the Disk Utility app on your Mac, select a volume in the sidebar, click the Partition button , then click Partition.
- In the pie chart, click the partition you want to delete, then click the Delete button .If the Delete button is dimmed, you can’t delete the selected partition.
- Click Apply, then click Partition.
- After the volume is deleted, click Done.
Erase a partition
- In the Disk Utility app on your Mac, select the volume you want to erase in the sidebar.
- Click the Erase button , then click Erase.If the Erase button is dimmed, you can’t erase the selected volume.
- After the volume is erased, click Done.
Enlarge a partition on a storage device
If you have multiple partitions on a device and one of them is running out of space, you may be able to enlarge it without losing any of the files on it.
To enlarge a volume, you must delete the volume that comes after it on the device, then move the end point of the volume you want to enlarge into the freed space. You can’t enlarge the last volume on a device.
WARNING: When you delete a volume or partition, all the data on it is erased. Be sure to back up your data before you begin.
- In the Disk Utility app on your Mac, select a volume in the sidebar, then click the Partition button .
- In the pie chart, select the partition you want to delete, then click the Delete button .
- Click Apply.The partition is removed, reformatted, and all free space is assigned to the previous partition.
- Click Done.
See alsoFile system formats available in Disk Utility on MacAdd, delete, or erase APFS volumes in Disk Utility on MacAbout Disk Utility on Mac