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Jan 04, 2012 How to Format an External Drive for Mac Compatibility. This is a simple procedure and is achieved the same way for all drive types and through all connections, be they USB, Firewire, or Thunderbolt. Formatting a drive will erase all data and partitions on the disk: Connect the hard drive or USB key to the Mac. Hard drive partitioning is a common issue discussed in many tech forums. In a thread on Apple’s support forum, users complain that their Mac Disk Utility partition grayed-out while trying to partition their external hard drives. Probably, you just bought your external hard drive and are eager to use it on your Mac. Feb 08, 2020 How to Partition an External Hard Drive on Mac. If you want to create multiple partitions on your external hard drive (in fact, you should for better file organization), here’s a step-by-step guide: Step 1: Highlight your drive and click “Partition” in Disk Utility. Open the Disk Utility app and highlight your external hard drive. Mac Disk Utility is a powerful built-in application in Mac OS that has undergone a series of changes with every major OS update. Many Mac users have complained that using Mac Disk Utility to resize a Mac Volume is no longer easy. However, being an experienced Mac. Mac OS X version 10.11 or later. Open the Finder and go to Applications Utilities Disk Utility. In the sidebar to the left, select your LaCie d2 drive. Select Erase. A dialog box opens. Enter a name for the drive. This will be the name displayed when the drive mounts. For Format, select OS X Extended (Journaled). For Scheme, select GUID.
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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.
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- 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
Partitioning An External Hard Drive In Mac Os 10
- 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.
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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.
![Backup mac to external hard drive Backup mac to external hard drive](/uploads/1/2/6/8/126882235/569099580.png)
- 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