Partition new hard drive mac os x

One or more storage devices that you wish to partition.

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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.

Benefits of making a partition in a Mac hard drive

In addition, the left-hand pane further divides the available storage devices into types, such as Internal and External. Select the storage device you wish to partition from the left-hand pane. You can only partition the drive, not any of the associated volumes. Drives usually have names that refer to the drive manufacturer or an external enclosure manufacturer.

How to partition a hard drive or SSD on Mac

To make things a bit confusing, both the drive and a volume can have the same name, so pay attention to the hierarchy displayed in the left-hand pane and only select the storage device at the top of a hierarchical group. In addition, you'll see a long bar that represents how the drive is currently divided up. Chances are it will appear as one long bar if there's only a single volume associated with it. With the drive selected, click the Partition button in Disk Utility's Toolbar.

A sheet will drop down, displaying a pie chart of how the drive is currently divided up. The sheet also shows the currently selected partition name, format type, and size. The instructions in the article below are designed to help repartition and format a hard drive. This process is data destructive and cannot be undone. Once the process begins, all the data on the drive will be lost! Be careful working with disks in the terminal.

Format Your Drive With Disk Utility

Incorrect actions can lead to data loss and even computer failure. Launch the Terminal app from the Utilities folder of your Applications folder, or use Spotlight to find it. When using dd or other duplication programs, always use raw device. Do not forget to replace the disk2 before pressing the key Enter.

How to Format or Partition an External Hard Drive for Mac

Do not forget to replace the rdisk2 before pressing the key Enter. This will prevent anyone or any software from recovering any previously written data from the drive. OS X may ask you if you want to use the drive for Time Machine backups, but you should choose Decide Later unless you want to use the entire drive for the backups. Select Partition and create the partitions based on your specific needs.

In my case, I chose a size of GB, which is one-third of the drive. After this, it will take a few minutes to partition, so be patient! When completed should see the green check mark next to your drive and it should say Operation Successful. Now to partition the rest of the space, you will click on Untitled under External and then click on Partition again.

Give the partition a name, pick a size and choose the format. My internal drive was already using GB of space, so when I typed in GB, it automatically changed it to GB and put up a message stating that the first volume cannot be removed and the volume could not be split because the resulting volumes would be too small.

So if you want to create an additional partition, the first thing is to create a partition that will include OS X and give you some additional space for installing programs, etc.

That means the partition where OS X is installed with have about GB of breathing room for extra data. Basically, we are just shrinking the original partition, which took up the entire disk to something smaller.