Partition usb drive mac el capitan

While it retains most of its key features, including the ability to partition a drive into multiple volumes, it has changed the process a bit. In this guide, we'll concentrate on the basics of creating drive partitions.

The version of Disk Utility that's included with OS X El Capitan and later allows you to divide a storage device into multiple partitions. Once the partition process is complete, each partition becomes a mountable volume your Mac can use in any way you see fit. Each partition can use one of six format types, four of which are exclusively for OS X file systems, and two that can be used by PCs.

Partitioning can be used to divide nearly any type of storage device, including SSDs , hard drives, and USB flash drives ; just about any storage device that you can use with the Mac can be partitioned.

In this guide, we're going to divide a drive into two partitions. You can use the same process to create any number of partitions; we just stopped at two because that's all you need to understand the basic process. So far, you've selected a drive to partition, and brought up the partitioning pie chart, which displays the current volumes as pie slices.

Partitioning your drive can result in data loss. If the drive you're partitioning contains any data, be sure to back up the information before proceeding. Share Pin Email. Tom Nelson has written hundreds of articles, tutorials, and reviews for Other World Computing and About. He is the president of Coyote Moon, Inc. Updated October 21, A Mac with OS X One or more storage devices that you wish to partition.

A few minutes of your time. The partitioning process is relatively quick; you may find that you spent more time reading this guide than it took to actually partition your drive. If the drive that you wish to partition is an external drive, be sure it's connected to your Mac and powered on. Disk Utility will open in a single window divided into two panes, with a toolbar across the top.

The left-hand pane contains the drive s and any volumes associated with the drives in a hierarchical view. In addition, the left-hand pane further divides the available storage devices into types, such as Internal and External.

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Select the storage device you wish to partition from the left-hand pane. First, review this introductory article: Create a bootable installer for macOS. Second, see this How To outline for creating a bootable El Capitan installer.

Helpful answers

Simply replace the Terminal command with the one from the preceding article by copying it into the Terminal window. Open the Terminal in the Utilities' folder. Choose the appropriate command line in red depending upon what OS X installer you want. Paste that entire command line from below at the Terminal's prompt:. You will be asked for your admin password. It will not echo to the Terminal window.

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Wait for the return of the Terminal prompt signifying the process has completed. It takes quite some time to finish. Be patient. Jan 20, 3: I am sorry for the misunderstanding, I don't want to boot my mac from a USB drive. I don't need the USB drive for this purpose anymore. Do you have a command Terminal to reset the full capacity of the USB drive, or maybe a third-party application but so far on the web, I could not find one for this specific purpose.

The formatted capacity of an advertised GB drive is around GBs.

To partition and format the flash drive on your Mac is as follows:. I don't have a partition option when I use Erase as shown in the screen shot. That's the problem. Jan 20, 6: Jan 20, 7: The Erase option works slightly differently for a physical disk than a logical volume. When the physical disk is used then Erase partitions the drive with one volume then formats that volume. However, if you choose an existing volume then the Erase option simply formats the volume. If you want to partition a disk into more than one partition, then you choose an existing volume, click on the Partition button, then you see a different panel in which you can partition the volume.

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