Published on October 20th, 2013
How to properly Format/Reformat a hard drive for Mac OS
3 The Best Mac Hard Drive Data Recovery Software. There are tens of thousands of products that can be used to get the work done easily when it comes to subjected question. It means that the user needs to ensure that the programs or the software mentioned in this part are the ones which will get the work done for the user easily. To format an external hard drive on your Mac (paraphrased from here ): Connect the drive to your Mac. Open Applications Utilities Disk Utility. On the left hand side of Disk Utility you'll see a list of drives. Select the Erase tab and choose Mac OS Extended (Journaled) for the format.
A hard drive or hard disk can be used in any type of computer, whether for PC (Windows) or for Mac. Google earth for mac. Before you can use it though, you need to properly format or reformat a hard drive so that it will become compatible or readable with the Operating System that you are using. In this guide I will show you how you can properly format/reformat a hard drive for Mac OS. Formatting a hard drive for Windows will be discussed in another article.
Formatting and Reformatting a hard drive or hard disk is an easy task (if you know how). But it is also dangerous as it can result in loosing data or corrupting the drive when it is not done properly.
Before I proceed, I will be explaining some few things regarding formatting a hard drive. But if you want to know the instructions in formatting and reformatting a hard drive, just scroll down to the instructions below.
First, why do we need to format and/or reformat a hard drive. I will name some reasons, common reasons why we need to do this.
1. Some hard drives are already pre-formatted for a certain platform or system, like when you buy it out of the box it’s already formatted for Mac or Windows. But when it is not, we need to format the drive.
2. Hard drives are formatted so that a particular platform or operating system will be able to read and recognize the drive, whether it is an internal drive or external drive.
3. Hard drives are reformatted because sometimes we need to do clean up and we just want to wipe everything out that is written in the drive.
4. Formatting/Reformatting a drive can also remove soft bad sectors. But not necessarily always. Sometimes when a drive has a physical bad sector, reformatting it could spread the damage.
5. We reformat a hard drive if we are switching from one platform to another (Windows to Mac and vice verse)
Back to the main topic, below is a step by step instruction on how to Format/Reformat a hard drive for Mac OS.
Warning: FORMATTING and REFORMATTING A DRIVE ERASES EVERYTHING. Proceed with caution. Do backup your files first.
Formatting/Reformatting a hard drive for a Mac
1. Open Disk Utility by clicking Finder -> Applications -> Utilities and finally click Disk Utility.
2. Choose the hard drive that you want to format or reformat. Make sure that it is the correct hard drive!
3. Go to the Partition Tab
4. Click the Current Volume Scheme drop down menu and choose One (1) partition.
5. Click Options, and from the Partition Scheme provided choose “GUID Partition Table” radio button or “Apple Partition Map” radio button.
6. Then click OK. Then key-in in the other options like Volume Name, Format and Size.
In this juncture, in the Format option, choose Mac OS for Mac OS X. Or MS-DOS File System otherwise.
In this juncture, in the Format option, choose Mac OS for Mac OS X. Or MS-DOS File System otherwise.
7. Click Apply and the Partition Disk screen will open.
8. Click Partition. During this time the drive or volume will dismount and it will be partitioned and formatted. DO NOT TURN OFF OR RESTART your computer during this time!
Time Machine may pop up asking you to use the newly formatted drive for backups. Just cancel it to proceed.
9. After that, just exit Disk Utility and your done!
Hope this “format/reformat a hard drive for Mac” guide helped!
Below are some recommended Internal Hard drive and External Hard Drives that you might like. All of them are best sellers.
Currently Best Selling Internal Hard Drives
1. WD Blue 1 TB Desktop Hard Drive: 3.5 Inch, 7200 RPM, SATA 6 Gb/s, 64 MB Cache – WD10EZEX
2. WD Red 3 TB NAS Hard Drive: 3.5 Inch, SATA III, 64 MB Cache – WD30EFRX
3. Western Digital WD1002FAEX Caviar Black 1 TB SATA III 7200 RPM 64 MB Cache Internal Desktop 3.5″ Hard Drive
4. Seagate Barracuda 3 TB HDD SATA 6 Gb/s NCQ 64MB Cache 7200 RPM 3.5-Inch Internal Bare Drive ST3000DM001
5. Western Digital 4 TB WD Green SATA III 5400 RPM 64 MB Cache Bulk/OEM Desktop Hard Drive WD40EZRX
Currently Best Selling External Hard Drives
1. WD My Passport Ultra Portable External Hard Drive USB 3.0 with Auto and Cloud Backup
2. WD My Cloud Personal Cloud Storage
3. WD My Passport Portable External Hard Drive Storage USB 3.0
4. WD My Passport for Mac Portable External Hard Drive Storage USB 3.0
Mac foundation for oily skin. 5. Seagate Backup Plus USB 3.0 Desktop External Hard Drive
Related Posts
Summary: Two methods to change Seagate external hard drives from read-only back to read-write, so that you can edit, delete, and rename files on this Seagate external hard drive. Also, if a Seagate external hard drive is read-only or files are locked on Mac due to NTFS format, you can use iBoysoft NTFS for Mac to mount it in read-write mode on Mac.
When you plug a Seagate external hard drive into your Mac, one of the worst things would be that you find your Seagate hard drive is read-only. Your photos, videos, and other files could be locked. Or your Seagate external drive could be write-protected. Are you facing such disk problem right now? Well, you are not the only one.
'I'm having a problem using my Seagate external hard drive. I only have permission to read files on my external hard drive, but I am not allowed to write or edit files on the drive when using Mac OS. Why this happened and how to fix Seagate external hard drive read-only on Mac?'
As you can see, even though Seagate is one of the most popular brands of storage devices all over the world, you could have trouble backing up or copying files to Seagate external hard drives, such as Seagate Backup Plus Protable drives. And the read-only issue, for example, Seagate external hard drives become read-only after macOS Mojave update, is one of the most common disk problems.
In this article, we introduced three possible reasons for disk being read-only on Mac, and you can find solutions to change the external drives from read-only accordingly.
- Table of contents
- Why a Seagate external hard drive is read-only on Mac?
- Case 1: The Seagate external hard drive is NTFS formatted
- Case 2: You don't have permissions to access the Seagate external hard drive
- Case 3: The Seagate external hard drive has some disk errors
Why a Seagate external hard drive is read-only on Mac?
You may be wondering why my Seagate external hard drive is read-only. In fact, read-only Seagate external hard drive results from various reasons. Generally, there are three possible reasons:
- The Seagate external hard drive is NTFS formatted
- You don't have permissions to access the Seagate external hard drive
- The Seagate external hard drive has some disk errors
In the following part, we'll go into details about how to fix the Seagate external hard drive read-onli issue in different situations.
Case 1: The Seagate external hard drive is NTFS formatted
Most of the time, a Seagate external hard drive being read-only on Mac is because the file system of this disk is the Windows NT file system (NTFS). That's because macOS disabled the NTFS write support by default. If you connect an NTFS formatted external hard drive to your Mac, you will find that files on this disk will be locked or show as read-only. You can only read this NTFS formatted Seagate external hard drive on Mac.
How to check if your Seagate hard drive is NTFS formatted on Mac?
- Open the Finder and click Go at the upper right of your desktop, then choose Utilities.
- Find Disk Utility and open it.
- Select your Seagate external hard drive in the left sidebar of Disk Utility.
- Then you can see Windows NT File System on the right.
- You can click the Info icon at the upper right to check if this disk is writable.
Solution: Use NTFS for Mac to write to Seagate external hard drives on Mac
In this situation, many people may think about converting NTFS to APFS or formatting it to make the NTFS drive compatible with macOS. However, the truth is that you can fix the Seagate external hard drive read-only issue without formatting, i.e. you don't have to lose your files on this drive.
Alternatively, you can download NTFS for Mac software to enable NTFS drive write support on Mac with no fuss. There are a great number of NTFS for Mac in the market, and iBoysoft NTFS for Mac is used here as an example.
iBoysoft NTFS for Mac: NTFS for Mac driver and more
iBoysoft NTFS for Mac is a handy disk management tool, which can help you mount NTFS formatted external hard drives, USB flash drives, SD cards, etc. on Mac with write support. This NTFS drive mounter is also compatible with macOS 10.15 (Catalina), macOS 10.14 (Mojave), macOS 10.13 (High Sierra), macOS 10.12 (Sierra) and Mac OS X 10.11 (El Capitan), 10.10 (Yosemite), 10.9 (Mavericks), 10.8 (Mountain Lion).
How to use iBoysoft NTFS for Mac to write to NTFS Seagate external hard drive on Mac?
Step 1: Download and install iBoysoft NTFS for Mac on your computer.
Step 2: Launch this NTFS driver for Mac and connect Seagate external hard drive to Mac.
Step 3: Write to Seagate external hard drive after the drive is mounted successfully.
Aside from being an NTFS for Mac driver, iBoysoft NTFS for Mac is also a wonderful tool to manage files on NTFS external drives. It lets users open, monut, repair, and erase NTFS drives on Mac natively and seamlessly.
Case 2: You don't have permissions to access the Seagate external hard drive
If your Seagate hard drive denies your access or restricts you to read-only activities, there is likely an ownership conflict. Being a multiuser operating system, macOS sets up access permissions for all files and folders on the system, including external drives.
Solution: Change permissions on Seagate external hard drive
To fix the read-only Seagate external hard drive issue, you need to regain full access. You can ignore the ownership or change the sharing and permissions of this disk in the Finder by following the below steps.
Step 1: Select Seagate external hard drive on your desktop or in the Finder sidebar, and then press Command + I to get information of the drive.
Step 2: Scroll to the bottom of this list and click on the triangle that is at the left side of the Sharing & Permissions tab.
Step 3: Click on the lock icon at the right bottom and type in the password to unlock this tab.
Step 4: Check the box to Ignore ownership on this volume, or you can toggle it off and then on if it's already enabled.
Step 5: Click on the gear button and choose Apply to enclosed items… to save your changes.
Then you can go to check if your Seagate external hard drive is read-only still. If not, you will be able to write to this disk.
Case 3: The Seagate external hard drive has some disk errors
If your Seagate external hard drive becomes read-only not for the reasons above, you may need to have a check if there is any inner disk error. Some formatting errors will make an external hard drive read-only on Mac. If this is the cause, usually you will see a warning in Disk Utility that states it is only being mounted in read-only mode.
Solution 1: Fix read-only Seagate external hard drive in Disk Utility
Fortunately, there is a built-in tool called First Aid that can check and repair some minor disk errors. When your Seagate external hard drive becomes read-only due to logical disk problems, you can use First Aid to repair it then.
Here is the guidance to fix read-only Seagate external hard drive with Disk Utility:
- Open Disk Utility.
- Select the read-only Seagate external hard drive on the left window.
- Click First Aid in the top center and choose Run to repair this disk.
Solution 2: Reformat Seagate external hard drive
However, if Disk Utility fails to fix read-only Seagate external hard drive, the last thing you can try to remove write protection from Seagate external hard drives would be reformatting. Reformatting will assign a new file system to this disk, consequently, the Seagate external hard drive issue could be fixed.
But before you go ahead to erase this disk, you should know that reformatting will wipe the files on this hard drive. Macbook pro commands. Thus, you are advised to check if you have a copy of data back in the first place , or you can recover data from this external hard drive with iBoysoft Mac data recovery to avoid data loss.
If you're sure that you have data backup in hand, you can proceed to reformat this read-only external hard drive with the following tutorial.
- Open Disk Utility as you did before.
- Select the read-only Seagate external hard drive in the left sidebar.
- Click Erase in the top center of Disk Utility.
- Fill in name, format, and scheme when the pop-up asks.
- Click Erase to confirm this operation.
How To Format Seagate Drive
A final note
Seagate Backup Drive For Mac
Besides Seagate external hard drives, Toshiba, WD, Samsung, or other brands' external hard drives will come across the read-only problem. It is common to see people complaining WD My Passport external hard drives suddenly became read-only on Mac. You can also use these solutions to fix this problem. But if you are unable to fix it with the solutions suggested above, you can only send it to local disk repair store for help, but that will cost a lot usually.