Mac os partition resize failed

Always back up your drive's data before resizing a volume.

Resize Mac Hard Drive with Disk Utility

You can enlarge a volume as long as it's not the last volume on the drive see the rules, above , and you're willing to delete the volume and any data it may contain that resides directly in back of the volume you wish to enlarge. Make sure you have a current backup of all data on the drive you wish to modify. Disk Utility will open, displaying a two-pane interface. Select the drive that contains the volume you want to enlarge.


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If the Partition button isn't highlighted, you may not have selected the base drive, but one of its volumes. The drop-down partitioning pane will appear, displaying a pie chart of all of the volumes contained on the selected drive. In our example, there are two volumes on the selected drive. Select the More Stuff volume by clicking once within its pie slice.

You'll notice the selected pie slice turns blue, and the name of the volume is displayed in the Partition field to the right. The partitioning pie chart will show you the expected outcome of your action. Remember, you haven't yet committed to the results.

GParted FAQ

In our example, the selected volume More Stuff will be removed, and all of its space will be reassigned to the volume to the right of the deleted pie slice Stuff. If this is what you want to occur, click the Apply button. Otherwise, click Cancel to prevent the changes from being applied; you can also make additional changes first. One possible change would be to control the size of the expansion of the Stuff volume. If you would rather add a smaller amount, you can do so by selecting the Stuff volume, entering a new size in the Size field, and then pressing the return key. This will cause the selected volume's size to change, and create a new volume made up of any free space that's left over.

You can also use the pie chart divider to adjust the size of the pie slices, but be careful; if a slice you wish to adjust is small, you may not be able to grab the divider. Instead, select the small pie slice and use the Size field. It would be nice if you could resize volumes without having to delete a volume and lose any information you have stored there.


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With the new Disk Utility, that isn't directly possible, but under the right circumstances, you can resize without losing data, although in a somewhat complicated manner. In this example, we still have two volumes on our selected drive, Stuff and More Stuff.

Helpful answers

We wish to enlarge Stuff by reducing the size of More Stuff, then adding the now free space to Stuff. Here is how we can do that:. From the right-hand sidebar, select the drive that contains both the Stuff and More Stuff volumes. Partitioning splits your hard drive into 2 separate sections, each with its own format. You can firstly specific the size of Bootcamp partition, and then install Windows on it.

Recover Files after Resizing a Partition in Windows/Mac

However, after running Windows, you may find that your Bootcamp partition is running out of space, and you need to increase its size to continue running Windows OS. So, it is not an easy task to resize Bootcamp partition. On the other hand, with the development of software technology, some software like Camptune X, Winclone can help you to resize Bootcamp Partition. And, each tool has its advantages. To be specific, those familiar with Winclone are aware that with its help you can create a larger Bootcamp partition without losing your original Windows data.

The process involves creating an image of the partition for safe keeping, deleting the original Bootcamp partition with Disk Utility, creating a new, more expansive partition, and then moving the data from the imaged partition to the new one with WinClone. Although this method is capable enough to enlarge your Bootcamp partition size, you have to delete Windows at first. Click to tweet. Step 2: Use Disk Utility to shrink your Mac partition to release some unallocated space as much as you need to add to the Bootcamp partition.

Step 4: Download MiniTool Partition Wizard Free edition from its official website, install it on your computer according to prompts and then launch it to get its main interface.

WiBisode: macOS High Sierra Free Space / APFS Partition Merging

Step 6: Choose the unallocated space from the Take Free Space from and then drag the sliding button to decide how much free space to take. You will be asked to restart your computer to apply the task since the Bootcamp partition is being used now by Windows. After all operations done, you have finished increasing the size of Bootcamp partition without deleting Windows.

When the task has completed, the Recovery HD volume will not be mounted on your Desktop, nor will it appear in Disk Utility it's a very special, very hidden volume! You can verify the functionality of this Recovery HD volume by holding down the Option key on startup, then selecting the Recovery HD volume as the startup disk. Note: When performing Recovery HD cloning tasks on a laptop, be sure to keep the Mac plugged into an AC power supply for the duration of the task. Recloning the Recovery HD volume may be helpful if the Recovery HD volume is invalid, or its partition type is invalid and it appears on your Desktop.

How to resize disk partition in macOS

In some cases you may have reason to remove a Recovery volume from your backup disk. To remove the Recovery HD volume:. While this is a non-destructive task for the donor volume, we recommend that you back up any data on this volume before making partitioning changes to it.


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  7. If you have not yet updated your backup disk e. In most cases, CCC will automatically prompt you to update the Recovery HD associated with your backup volume once you've done your first backup on the new OS. If you are booted from the volume that you have selected in CCC's sidebar, the option to Restore or Remove the Recovery HD associated with that volume will be disabled. This is commonly encountered when you have booted from your backup volume.

    To make changes to the Recovery HD associated with your startup disk, first boot your Mac from some other startup volume.