Mac os extended hard drive format

The process of formatting a drive is often confused with erasing a volume. The difference is that formatting affects an entire drive, including any volumes and partitions that have been created on it, while erasing a volume affects just that volume, and doesn't destroy partition information.

That being said, the version of Disk Utility included with OS X El Capitan and later actually doesn't use the word format; instead, it refers to both the formatting of a drive and the erasing of a volume with the same name: Erase. So, while we're going to be formatting a drive, we'll use Disk Utility's Erase command. That's all there is to the basics of formatting a drive using Disk Utility.

How to Partition an External Hard Drive on Mac

Remember, the process outlined here creates a single volume using all available space on the selected drive. Also be aware that the Format and Scheme types listed in the Erase option of Disk Utility will have changes as time goes on. 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 November 15, If your files on this external hard drive shows as read-only or locked, or if you try to move some files to the Trash but get no response, you can try to change the permission of this disk. Step 1: Open the Finder and find your external hard drive in the left sidebar.

Step 3: Extend this column by clicking on the triangle symbol, and then click on the Lock button. Step 5: Click the gear button Action menu at the bottom of the window, choose Apply to enclosed items , and then click OK to confirm the action. To prevent such errors from happening, Mac operating system includes a setting to ignore Permissions on external drives, so all files on the drive should be fully accessible regardless of their Permissions settings. Here below are steps to ignore the permission on external hard drives:. Step 3: Check the box to Ignore ownership on this volume , or toggle it off and then on if it's already enabled.

Provide the password of your Mac if it is required. Some internal errors will cause a drive to be read-only as well. When this happens, your drive will be only mounted in read-only mode to prevent the data on it from corruption. Fortunately, you can take some actions to repair these minor disk errors with Disk Utility on your Mac.

You can use the following guide to fix read-only external hard drive in Disk Utility without formatting. Step 1: Click Go at the upper right of your desktop and go to Utilities , and then open Disk Utility. However, it is possible that an NTFS format is not the culprit of your disk being read-only. On the contrary, some other reasons make your disk not writable. For instance, if your disk becomes read-only after a macOS update, you may be facing one of the rare glitches of a macOS. Under this circumstance, if the solutions above are unable to fix this read-only external hard drive, you may need to format this drive, and then recover your important data from the formatted external hard drive instead.

How to Format or Partition an External Hard Drive for Mac

Generally speaking, external hard drives being read-only on Mac appears when they are not formatted correctly and the solutions above should be helpful. Nevertheless, if you failed to repair this hard disk even with Disk Utility, it could be a failed external hard drive which needs to be replaced, or you can try your luck by sending it to a local disk repair service. Katrina is a data recovery expert iBoysoft who loves to help readers solve various data recovery problems. Thus, your Mac is in danger when using this driver. However, you can use it to manually mount NTFS partitions in read-write mode if you never mind using the Terminal.

This will be safer, but you need to do more work. You can go to google the steps and see how complex they are. It is just for educational purposes, and it is available on Mac OS Perhaps, it will be unstable forever. Then, the drive can be used on both Mac and PC. There should be some important data on the drive.

What’s the Difference Between APFS, Mac OS Extended (HFS+), and ExFAT?

If you are a personal user, you can try its Professional Edition. Buy Now. Download this software to your computer.


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Then, you can open the software and input the license key to the pop-out window to get its Professional Edition. If there is more than one NTFS partition, convert all of them one by one. By this way, you can easily format an external hard drive for Mac and PC without losing any data. Then, you can share external hard drive between Mac and PC. You can choose to copy and paste those files to other external devices or internal hard disk of Windows, but it will cost much time.

Instead, you can use MiniTool Partition Wizard Free Edition to create a copy for your external drive, which is faster. Free Download.


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Firstly, you need to delete the partition by using this software. Just open the software to enter its main interface. Then, choose the target partition and click " Delete Partition " from the left action pane. After that, you should click " Apply " to keep this change. Secondly, the target partition will become unallocated.

Format external drives to Mac OS Extended before using with Aperture

Here, you need to choose that partition and click on " Create Partition " from the left action pane. Thirdly, you will see a pop-out window. At the same time, you can also set some other parameters for this partition, including " Partition Label ", " Drive Letter ", " Size And Location ". After that, please click on " OK ".