Format your Seagate hard drive to Mac OS Extended (Journaled) file system. And use your Seagate hard drive for a Time Machine backup of your MacBook Pro, MacBook Air or iMac. Plus you can drag and drop your files. Copy and paste your files to and from your Seagate external hard drive onto your Mac. And it only takes minutes to do. Seagate Backup Plus Slim 2TB External Hard Drive Portable HDD – Light Blue USB 3.0 for PC Laptop and Mac, 1 year Mylio Create, 2 Months Adobe CC Photography (STHN2000402) 4.7. To fix the unrecognized Seagate external hard drive on Mac, the very first thing is to check whether it's the USB port's issue. Plug in the drive to another USB port or a different computer, and check if the drive is recognized, detected or shows up on Mac. If yes, congratulations. Both the external hard drive and the data on it are secure.

• Seagate External Hard Drive For Mac
• Seagate External Hard Drive For Mac Write Permissions
• Seagate Backup Plus For Mac
• Seagate External Hard Drive User Manual

Summary: Seagate external hard drive not recognized/showing up on Mac? Have no data backup? Feel very upset when finding you can't see any file on the external hard drive? Now download free external hard drive data recovery software for Mac - iBoysoft Data Recovery for Mac to recover lost data from unrecognized Seagate external hard drive.

It's a dime a dozen that Seagate external hard drive is not showing up or recognized by Mac computers. Some users even say that they can see the Seagate external hard drives' light blinking but the computer just won't give any response.

Hopefully, in this article, you can find out how to fix if you can't find Seagate external hard drive on Mac and how to recover lost data from unrecognizable hard drives easily.

Part I: Why does Seagate external hard drive not recognized/showing up on Mac?

Seagate external hard drives are likely to be damaged or corrupted when backing up or transferring data among computers. So, you could plug the external hard drive into your Mac, only to find that the Seagate external hard drive is not recognized by your Mac all of a sudden like this user:

'I have a MacBook Pro with macOS El Capitan. My WD hard drives are recognized, but my new Seagate 1T drive is not showing up. The light on the drive works, which tells me that it is drawing power from the computer. But the computer does not recognize the drive. Anyone knows how to fix Seagate external hard drive not recognized, showing up, or detected on Mac or at least recover files from the drive?'

You may be wondering 'Why my external hard drive is not recognized/showing up on Mac?' Well, the reasons behind hard drive problems could be varied and there are some common ones.

1. Bad USB port
2. macOS update issue
3. System failure
4. File system corruption
5. Motherboard issue
6. Virus infection
7. External drive damage or corruption, etc.

Baisc check - Check if Seagate external hard drive is showing up in Disk Utility/Finder?

Seagate External Hard Drive For Mac

To fix the unrecognized Seagate external hard drive on Mac, the very first thing is to check whether it's the USB port's issue. Plug in the drive to another USB port or a different computer, and check if the drive is recognized, detected or shows up on Mac. If yes, congratulations. Both the external hard drive and the data on it are secure. But to access files on this drive, you need to move forward to do some basic checks and try out the solutions according to your situations.

Important thing: Check if the Seagate external hard drive is showing up in Disk Utility/Finder?

Seagate External Hard Drive For Mac Write Permissions

Usually, if your external hard drive is recognized/showing up by your Mac, you will see this drive on the desktop and Finder. But for many Mac users, when they can't find their disk drives in Finder or on the desktop, they would say the drive is not recognized by the computer. But actually, most of the time, even if a Seagate external hard drive doesn't show up in Finder, it still can be found in Disk Utility. So please check whether the drive is showing up in Disk Utility/Finder.

There are three possible outcoms. Just check them one by one and go head to fix this issue.

Scenario 1: Seagate external hard drive isn't showing up in Finder/on the desktop

When a hard drive is plugged into a Mac, the first impression for most users is that the icon of this drive will show up on the desktop and in Finder. But why your Seagate external hard drive is not showing up in Finder or on the desktop? Indeed, it is because you haven't set up your Mac to do so.

1. Show Seagate external hard drive in Finder

Step 1: Go to Finder > Preferences > Sidebar tab.

Step 2: Select 'External disks' under 'Locations', and then your Seagate external hard drive will show up in Finder.

2. Show Seagate external hard drive on the desktop

Step 1: Go to Finder > Preferences > General tab.

Step 2: Tick 'External disks' to show the Seagate external hard drive on the desktop.

Scenario 2: Seagate external hard drive is recognized but not mounted in Disk Utility

If the Seagate external hard drive shows up in Disk Utility but is just not mounted, it at least means the drive is recognized by your Mac. Mounting a hard disk makes it accessible by the computer, enabling the operating system to read and write to files on the disk. Most of the time, the operating system will automatically mount your disk when you connect your USB drive to this Mac, but you if you find the Seagate external hard drive unmounted in Disk Utility, you have two solutions.

Solution 1: Manually mount the Seagate external hard drive

You can simply right-click this external hard drive in Disk Utility, and choose Mount or click the Mount button on the top of the window. You will be able to access your files if it can be mounted successfully.

Solution 2: Repair the Seagate external hard drive with First Aid

However, if the Seagate drive is unmountable or the Mount icon is greyed out, it could be some disk errors that prevent your Mac to recognize/detect the drive correctly. Fortunately, there is a native disk repair tool called Disk Utility on your Mac and you can repair this external hard drive with the following steps.

1. Click on the Launchpad on the Dock and find Other.
2. Locate Disk Utility and open it.
3. Select the unmountable external hard drive in the left sidebar and choose First Aid at the top.
4. Click Run to repair this Seagate hard drive.

Solution 3: Fix the unmountable Seagate external hard drive by reformatting.

If First Aid failed to repair this drive, the file system or the partition table of this external hard disk could be corrupted. In this case, reformatting is a feasible method to fix the corrupted file system or partition table. However, it will also erase all data stored on it. So, to avoid unnecessary data loss, you should firstly make sure you have a copy of data backup or recover files from this drive with reliable data recovery software.

How to recover data from Seagate external hard drive on Mac?

When an external hard drive is not working, not recognized, not detected, or not showing up on your Mac, you will feel very terrible because you can't access files nor the drive at all.

iBoysoft Data Recovery for Mac is useful data recovery software, which can recover lost data from unrecognized Seagate Backup Plus drives and unreadable Seagate external hard drives. Moreover, this program supports file recovery from hard drives of Seagate, WD, Toshiba, Samsnug, etc. Generally, it can recover lost data from formatted, unmountable, inaccessible, unreadable or corrupted hard drives. This powerful data recovery software can also recover lost data from Macintosh HD drives, USB flash drives, SD cards, memory cards, etc. on Mac.

iBoysoft Data Recovery for Mac now is fully compatible with macOS 10.15 (Catalina), 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), 10.7 (Lion). And the macOS 10.15 (Catalina) is approaching.

Step 1: Launch iBoysoft Data Recovery for Mac.

Step 2: Select the Seagate external hard drive and click 'Next' button to scan for all the lost data.

Step 3: Double-click to preview your images, videos, word files, etc. in the searching results.

Step 4: Choose files you need and click 'Recover' to get them back and save the recovered files to another usable disk drive.

After recovering target files from this Seagate external hard drive, you can now reformat the drive in Disk Utility without worrying about data loss.

• How to reformat Seagate external hard drive on Mac?

Scenario 3: Seagate external hard drive is not detected in Disk Utility

However, if the Seagate external hard drive is not even showing up on Mac or not detected in Disk Utility, it is possible that the drive has some hardware problems like bad sectors.

Usually, the symptoms would be:

• The external hard drive makes clicking/beeping noise.
• Files get missing/disappeared/invisible/inaccessible.
• Documents or Folders become empty.
• Disk information like storage capability or files system is not showing normally in Disk Utility.
• Some other abnormal symptoms.

Confronted with such kind of hard drive failure, you'd better seek help from a local disk recovery and repair service for good.

Conclusion:

Sometimes, the Seagate external hard drive not recognized/showing up on Mac problem is just that Seagate external hard drive not showing up in Finder, not showing up on Mac desktop, or not mounted in Disk Utility, which can be easily solved. However, your any attempts to fix the unrecognized Seagate external hard drive may write new data to the drive and overwrite the original one. Thus, if you're facing such kind of problems, you should firstly recover lost data from the Seagate external hard drive with a professional data recovery software like iBoysoft Data Recovery for Mac before you set about fixing this problem.If you encontered the the problems on a Windows computer, then this article: Why and how to fix the Seagate external hard drive not showing up would be of great hlep to you.

See also: How to fix external hard dirve for PS4 not recognized when you use Seagate Game Drive for PS4.

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 you saved from a Windows PC 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?'

You might have trouble backing up or adding files to Seagate external hard drives on Mac. But it's not necessarily because the disk is locked but some other reasons. For example, the Seagate external hard drive becomes read-only on Mac.

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.

Why is your Seagate external hard drive 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. It could be the NTFS format that makes this trouble since NTFS is not writable on Mac. 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 Seagate external drives are read-only on Mac because they are pre-fomatted with Windows NT file system (NTFS) by the manufacturer. So your Seagate HDD is read only on Mac, which affects Seagate Backup Plus Ultra Touch, Portable drive, and Slim.

Seagate Backup Plus For Mac

However, 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 but can't add files to this Seagate external hard drive on Mac.

How to check if your Seagate hard drive is NTFS formatted on Mac?

1. Open the Finder and click Go at the upper right of your desktop, then choose Utilities.
2. Find Disk Utility and open it.
3. Select your Seagate external hard drive in the left sidebar of Disk Utility.
4. Then you can see Windows NT File System on the right.
5. 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, what you need is not to unlock the Seagate external hard drive but a NTFS for Mac driver. Many people would think about converting NTFS to APFS or formatting the Seagate drive for Mac to make it 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 the read-only Seagate external hard drive to Mac.

Step 3: Then, you can fully write and copy data to the Seagate external hard drive on Mac 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 permission issue. 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.

But if you can't access the Seagate external hard drive as it's locked still. Well, the disk may be really locked by certain programs, especially for Seagate Backup Plus Ultra Touch. Then you need to unlock the password protection or hardware encryption with Seagate Secure software.

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. Click to see more errors of the Seagate external hard drive not showing up on Windows.

Solution 1: Fix read-only Seagate external hard drive in Disk Utility

Seagate External Hard Drive User Manual

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:

1. Open Disk Utility.
2. Select the read-only Seagate external hard drive on the left window.
3. 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. Thus, you are advised to check if you have a copy of data back in the first place , or you can recover lost 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.

1. Open Disk Utility as you did before.
2. Select the read-only Seagate external hard drive in the left sidebar.
3. Click the Erase button in the top center of Disk Utility.
4. Fill in name, format, and scheme when the pop-up asks.
5. Click Erase to confirm this operation.

A final note

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. What's more, an NTFS formatted WD external hard drive won't work on your PS4 console for gaming as well. 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.