How to fix the disk you inserted is not readable on MacBook?

Posted by Katrina to Mac Data Recovery Tips on August 7th, 2018

Whenever I plugged the Sandisk USB flash drive into my MacBook, I get the error message 'the disk you inserted was not readable by this computer.' I have many family pictures and working documents saved on the USB, is there any way to fix MacBook the disk you inserted is not readable error and get access to my data?

No matter what computer you are using, MacBooks, MacBook Pro, MacBook Air, etc., you have chance to meet the error message: 'The disk you inserted was not readable by this computer'. This error means the file directory of your external drive. Usually, the corruption is caused by virus attack, improper shutdown, power failure, and internal file system errors, etc. How to fix MacBook the disk you inserted is not readable? In this post, you will get two feasible solutions.

How to fix MacBook the disk you inserted is not readable without data loss?

Do you think initializing is your only choice? Are you worried about data loss problem? The following are two fixes to external hard drive not readable by this computer.

Fix 1: Repair the unreadable external drive in Disk Utility

Step 1: Go to Applications > Utilities > Disk Utility.

Step 2: Select the unreadable disk.

Step 3: Click First Aid on the top of Disk Utility window.

Step 4: Wait till the reparation of the unreadable disk process finished.

Fix 2: Recover lost data and then reformat the unreadable external drive

If Disk Utility is unable to fix the disk is not readable on Mac, the only way is to reformat the unreadable external drive. To avoid data loss, you should recover lost data from unreadable external hard drive at first.

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

iBoysoft Data Recovery for Mac is a free Mac data Recovery software which has ability to recover lost data from unreadable external hard drive, USB flash drive, SD card, memory card, pen drive, digital camera, etc. on macOS Catalina 10.15/Mojave 10.14/High Sierra 10.13/Sierra 10.12/10.11/10.10/10.9/10.8/10.7. It also allows you to recover lost data from formatted, unmountable, inaccessible drive. More importantly, iBoysoft Data Recovery for Mac can recover deleted/lost documents, audios, videos, emails from APFS, HFS, HFS+, exFAT, FAT32 drives.

Tutorial to recover lost data from unreadable external drive on MacBook

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

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

Recover lost data from unreadable external drive on MacBook

3. Select the unreadable external 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

Now you've got all files off the unreadable hard drive with iBoysoft Data Recovery for Mac. But to make the disk you inserted read by your Mac computer, you need to go further by reformatting this hard drive.

How to reformat external hard drive on Mac computers?

Still have questions?