How to fix Seagate external hard drive not readable on Mac?

Posted by Katrina to Mac Data Recovery on February 19th, 2018

Summary: Sometimes, when you connect your Seagate external hard drive to a Mac, you will receive an error: "The disk you inserted was not readable by this computer". In the following content, we will discuss this problem and show solutions to fix Seagate external hard drive on Mac.

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> Why is Seagate external hard drive not readable on Mac?
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Problem – Seagate external hard drive not readable on Mac

Seagate external hard drive not readable/working on Mac? This is a common problem, especially when connecting Seagate external hard drives between macOS, Windows and Linux. It can also happen on a single system where it was working just fine for a long time and then suddenly stops being read by the operating system.

Here is a complaint from forum:

I never had a problem with Seagate backup plus for Mac desktop until now. I connected it, and it keeps saying "disk not readable". I have only used it on one device. I have options to initialize, ignore, and reject. How to fix it? I have MacOS high Sierra version 10.13.4.

Sometimes the solution is easy but sometimes it is a bit more complicated. This article will go through different solutions to fix Seagate external hard drive not readable on Mac.

Why is Seagate external hard drive not readable?

As a matter of fact, the Seagate external hard drive not working issue can be caused by various reasons, including dead USB ports, wrong file system, driver issues, virus infection, power failure, and so on. So, the solutions are varied. Keep reading to find how to fix Seagate external hard drive not readable on Mac.

How to fix Seagate external hard drive not readable on Mac?

Solution 1: Eject and reinsert the Seagate external hard drive

The first attempt is to remove the Seagate external hard drive and the replug it on your Mac computer.

Solution 2: Check the driver

The next step is to check the driver. As you know, sometimes, old drivers can also cause a device to malfunction when connected to a Mac computer. You can attempt to verify, update or reinstall the outdated driver.

Solution 3: Repair the unreadable Seagate external hard drive

First Aid in Disk Utility is a useful tool to check and verify disk errors on macOS. If your Seagate external hard drive is not readable by this computer, you can try running First Aid.

Step 1: Launch Disk Utility.

Step 2: Choose the Seagate external hard drive from the left sidebar.

Step 3: Click the 'First Aid' tab on the top.

Solution 4: Recover data and then reformat the unreadable Seagate external hard drive

If First Aid fails on the external hard drive, the drive may have some serious file system problems. The only way is to reformat the drive. But if you didn’t back up important files, please recover data from the unreadable Seagate external hard drive at first.

Step 1: Recover data from the unreadable Seagate external hard drive

iBoysoft Mac Data Recovery is a free external hard drive data recovery software, capable of recover data from your external hard drives which has become corrupted and unreadable for some reasons. The utility is incorporated with powerful algorithms that scans your entire external hard drives quickly and retrieve all your data on macOS Mojave 10.14/High Sierra 10.13/Sierra 10.12/10.11/10.10/10.9/10.8/10.7.

Besides, iBoysoft Mac Data Recovery performs successfully from the failed, corrupted, formatted, external hard drives, hard drives, SD cards, memory cards, USB flash drives, thumb drives, CF cards, etc. It also offers free preview of the recovered files and useful filtering methods, making data recovery a piece of cake.

1. Download and install iBoysoft Mac Data Recovery on Mac.

2. Launch iBoysoft Mac Data Recovery.

Recover data from unreadable Seagate external hard drive on Mac

3. Select the unreadable Seagate external hard drive and click "Next" button to scan for all the lost data.

4. Preview the searching results, choose files you need, and click "Recover" to get them back.

Step 2: Reformat the Seagate external hard drive

After data recovery, you can reformat the Seagate external hard drive for reuse. Launch Disk Utility and select the external hard drive from the left sidebar of the window. Click the Erase button on the top of the Disk Utility window. Complete the related information (name, format, scheme), then click Erase.

Bottom line

This post has summarized almost all feasible solutions for users who have got headache on Seagate external hard drive not readable issue. To avoid this kind of unnecessary trouble, you need to pay more attention to the operation you have made during the usage. What's more? If some accidents happen and lead to data loss, you should stop using this device and run iBoysoft Mac Data Recovery to get lost data back.

Still have questions?