How to fix/repair unreadable external hard drive on Mac?

Posted by Juno to Mac Data Recovery on December 1st, 2017

Hi, I have stored some important data on my external 1TB Seagate hard drive. But, when I try to access it, I am getting an error message saying "the disk you inserted was not readable by this computer" What should I do to fix unreadable external hard drive on Mac and recover lost files from it? Please help!

It is common for us to be reminded that our external hard drive is unreadable when connecting it to Mac. After that, the drive as well as files on it will become inaccessible. How heartbreaking it would be if those files are very important for us. Here is an easy method to fix external hard drive unreadable on Mac as well as recover data from unreadable external hard drive.

Tips for recovering data from unreadable external hard drive on Mac

When we find our external hard drive has become unreadable, we should stop using the unreadable drive or saving new files on it, avoid reformatting the drive. Otherwise, those further operations will write data to the drive and may overwrite the original files. Under that condition, the chances of recovering lost files from the drive will be minimized.

Easy method to fix/repair unreadable external hard drive on Mac

To avoid data loss, we'd better recover data from unreadable external hard drive before fixing the unreadable drive.

Step 1: Recover data from unreadable external hard drive on Mac

All we need is iBoysoft Mac Data Recovery, free and professional Mac data recovery software that can recover data from unreadable external hard drive, recover data from formatted external hard drive, recover data from unmountable external hard drive, recover data from unrecognized external hard drive, recover data from corrupted external hard drive, recover deleted files from external hard drive, recover deleted/lost partition, etc. on macOS 10.14/High Sierra 10.13/10.12 and OS X 10.11/10.10/10.9/10.8/10.7.

Aside from recovering data from external hard drive, iBoysoft Mac Data Recovery can also perform reliable data recovery from various storage devices, including hard drive, USB flash drive, memory card, pen drive.

Follow the steps below to recover data from unreadable external hard drive:

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

2. Connect the unreadable external hard drive to Mac, and then launch iBoysoft Mac Data Recovery.

Recover data from unreadable external hard drive on Mac

3. Select the unreadable external hard drive and click "Next" to scan all lost files.

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

5. Have a check to ensure all lost files have been successfully recovered.

Step 2: Reformat the unreadable external hard drive

After successfully recovering data from unreadable external hard drive, we can fix unreadable external hard drive by formatting.

1. Launch Disk Utility.

2. Click the icon of the unreadable external hard drive on the left part of the window.

3. Click the Erase on the top of the Disk Utility window.

4. Complete related information (name, format, scheme, etc.), and then click Erase button.

Still have questions?