My SD card stopped working on my MacBook Pro recently. When I inserted it into the slot, it didn't appear on the desktop nor in the Finder, seemed my MBP wasn't reading the SD card. Any ideas to fix the SD card that not working on my Mac?
Normally, your Mac computer recognizes an SD card as a USB storage device, which you can mount, read from, and write to. However, if the SD card stops working on your Mac, just like SD card not mounting on Mac, SD card not readable by this computer, SD card not showing up on Mac computer, you'll have no access to the files stored on it. Follow this tutorial to fix SD card not working on Mac problem and recover your files from SD card without any loss.
Basic troubleshooting steps to fix SD card not working on Mac problem
Step 1: Sometimes the SD card won't work properly if you put it into the Mac slot too slowly. So, try to insert the SD card quickly.
Step 2: Restart your Mac and simultaneously press "Command+Option+P+R" keys to reset NVRAM or PRAM. This will clear some settings that could lead to SD card not working on Mac.
Step 3: Insert the improperly working SD card, then go to Apple Menu > About This Mac > System Report > System Information. If you can see the card info, it means the card is recognized but not being mounted on this Mac. Try to mount the SD card to make it work properly.
Further solutions to fix SD card not working on Mac
Solution 1: Fix the not working SD card with Disk Utility
Disk Utility is a built-in tool to deal with disk errors on Mac. So you can try to fix SD card not working on Mac issue with it.
Step 1: Go to Disk Utility.
Step 2: Select the not working SD card from the sidebar.
Step 3: Click First Aid on the top of the window.
Solution 2: Fix the not working SD card by reformatting
If Disk Utility failed to fix the SD card not working on Mac issue, the SD card might be corrupted and need reformatting. Before that, you'd better recover files from the not working SD card with reliable Mac data recovery software, like iBoysoft Mac Data Recovery.
iBoysoft Mac Data Recovery is free SD card data recovery software for Mac which works seamlessly on macOS Mojave/High Sierra/Sierra and Mac OS X 10.11/10.10/10.9/10.8/10.7. It's able to recover deleted photos, videos, documents, music from SD cards, external hard drives, USB drives, memory cards and other storage devices. In addition, it supports recovering files from APFS, encrypted APFS, HFS+, HFS formatted drives without any loss.
Tutorial to recover data from not working SD card with iBoysoft Mac Data Recovery
Step 1: Download and install iBoysoft Mac Data Recovery.
Step 2: Launch this program. Select the SD card that not working on Mac and click "Next". The program will start scanning this SD card for recoverable files.
Step 3: After the scanning process finishes, you can click the found files and preview.
Step 4: Choose what you want to get back and click "Recover".
After you successfully recovering files from the not working SD card on your Mac, you can erase/reformat the SD card in Disk Utility.