SD card is not readable by this computer, how to fix without data loss?

Posted by Katrina to Mac Data Recovery on January 16th, 2018

I had this issue when I inserted my SanDisk micro SD card via card reader in my Mac Book Pro, I got an error saying "the disk you inserted was not readable by this computer". I had family pictures and working document saved on the SD card and it work fine before. I have no idea what happened. Is there any way to fix SD card is not readable by this computer error on Mac?

Just like what happened above, many Mac users have a similar experience of unreadable SD card/memory card. When this issue happens, error messages like "the disk you inserted was not readable by this computer" will pop up and prevent us from accessing the device and data. Actually, unreadable error not only happens to SD card, but also occurs to USB flash drive, external hard drive, memory card and other removable storage devices.

Possible causes of not readable SD card error

The reasons why SD card is not readable by this computer can be various. Here we list six common causes:

1. Virus infection/malware attack

2. Internal file system error

3. Sudden power outage

4. Improper eject

5. inappropriate operation

6. some physical damage

In general, "SD card is not readable Mac" error results from corrupted file directory that the operating system cannot recognize its file system.

How to fix "SD card is not readable by this computer" error on Mac without data loss?

How to fix SD card not readable Mac? Here are two solutions. When the file directory becomes corrupted, we may think of the repair the SD card. If it is not repairable, we have to recover data from not readable SD card.

Solution 1: repair unreadable SD card with Disk Utility's First Aid

Step 1: Go to /Applications/Utilities/Disk Utility/, then click Continue.

Step 2: In the sidebar, select the disk you want to repair.

Step 3: Click the First Aid button.

If Disk Utility tells you the disk is about to fail, back up your data and replace the disk. You can't repair the SD card. Otherwise, continue to step 4.

Step 4: Click Run.

If Disk Utility reports that the disk appears to be OK or has been repaired, you're done. Otherwise, you have to retrieve as much of your data as possible.

Solution 2: recover data and then reformat the unreadable SD card

If Disk Utility doesn't work for your SD card, you have to recover your important data with free Mac data recovery software, and then fix Mac not reading SD card by formatting.

iBoysoft Mac Data Recovery is a free Mac data recovery software that can recover data from not readable SD card, recover data from formatted SD card, recover data from unmountable SD card, recover data from corrupted SD card, recover deleted/lost files from SD card, etc. on macOS Mojave 10.14/High Sierra 10.13/10.12 Sierra and 10.11/10.10/10.9/10.8/10.7.

Aside from SD card data recovery, iBoysoft Mac Data Recovery also perform well in hard drive data recovery, external hard drive data recovery, USB drive data recovery, memory card data recovery, no matter which are video, photo, audio and email.

Tutorial to recover data from not readable SD card on Mac with iBoysoft Mac Data Recovery

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

recover data from not readable SD card on Mac

Step 2: Connect the not readable SD card to Mac with a card reader.

Step 3: Launch iBoysoft Data Recovery, and select the not readable SD card.

Step 4: Click "Next" to search for all lost files on the not readable SD card.

Step 5: Preview the listed recoverable files, choose those we want, and click "Recover" button to get them back.

After successfully restored all lost data, we can fix SD card is not readable Mac error by formatting it without worrying about data loss.

APFS data recovery software

iBoysoft Mac Data Recovery is also the best APFS data recovery software that can recover data from formatted APFS hard drive, recover data from unmountable APFS drive, recover data from unreadable APFS hard drive, recover data from inaccessible APFS drive, recover deleted/lost APFS partition, etc.

Powerful preview before recovery

iBoysoft Mac Data Recovery can preview documents, photos, videos, audios, etc. file types that your Mac computer can support to preview.

Still have questions?