Mac Os Hard Drive Locked Partition

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Disk Utility User Guide

Partitioning a disk divides it into individual sections, each of which acts as a separate volume.

I also had an issue with a locked disc when I was in recovery mode. I ended up installing High Serria on a thumb drive, rebooting the mac holding down command, and selected the thumb drive to boot from. From there I was able to erase the mac's hard drive with JOURNALED selected. Exit disc utility and installed High Serria. It's installing now. Here's how to split your Mac hard drive into multiple partitions or volumes so that you can run more than one OS on your Mac, or divide up your Mac so different users can have their own space.

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.

I believe you followed the official guides and you tried to factory reset your Mac and you find yourself in this situation: the disk is locked and you cannot select it for re-installation. You already tried to partition the disk multiple times but it keeps erroring with the Error: -61. In this case you can try.

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.

1. 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.

2. Click the Add button .

3. 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.

4. Click the Format pop-up menu, then choose a file system format.

5. Enter the size or drag the resize control to increase or decrease the size of the volume.

6. Click Apply, click Partition, then click Continue.

   Click Show Details to view the step-by-step process of creating a new volume.

7. 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.

1. In the Disk Utility app on your Mac, select a volume in the sidebar, click the Partition button , then click Partition.

2. 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.

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3. Click Apply, then click Partition.

4. After the volume is deleted, click Done.

Erase a partition

1. In the Disk Utility app on your Mac, select the volume you want to erase in the sidebar.

2. Click the Erase button , then click Erase.

   If the Erase button is dimmed, you can’t erase the selected volume.

3. After the volume is erased, click Done.

Partition Hard Drive Mac

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.

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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.

1. In the Disk Utility app on your Mac, select a volume in the sidebar, then click the Partition button .

2. In the pie chart, select the partition you want to delete, then click the Delete button .

3. Click Apply.

   The partition is removed, reformatted, and all free space is assigned to the previous partition.

4. 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

If you have previously partitioned your Mac's hard drive in order to download a macOS beta or install Windows, but now you need that storage space back, you can remove the partition and recapture the much-needed space. Here's how.

Getting rid of a secondary partition on the Mac is a two-step process. After erasing a partition, you can then remove it from your system.

Before you start

The most important thing to do before making any changes to your hard drive is to back it up. Time Machine has the easiest way to back up your data if you don't already have a system in place.

How to erase a partition on your Mac

Make sure to restart your computer in your main partition to erase additional ones.

1. Open Finder from your dock.

2. Select Applications.

3. Scroll down and open the Utilities folder.

4. Double-click to open Disk Utility.

5. Select the partition you wish to erase.
6. Click Erase.
7. Click Erase to confirm you wish to erase the partition.

8. Click Done to continue.

How to remove a partition on your Mac

After following the steps to erase a partition, you can then remove it from your hard drive.

1. Select your main partition, which is the first drive on the list. It might be called 'Fusion' or 'Macintosh HD.'

2. Click Partition.

3. Select the partition you wish to remove from the graph.
4. Click the minus (-) button.

5. Click Apply.

Disk Utility will check the disk and make changes. This will take several minutes.

Partition Os Drive

Any questions?

Do you have any questions about how to erase and remove a partition on your Mac? Let us know in the comments and we'll help you out.

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Mac Os Hard Drive Locked Partitions

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