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SanDisk 64GB SD Card Won't Read on Mac, How to Fix?

I prepared two SanDisk 64GB SD cards (Extreme SDXC Class 10) for my new Fuji X100S camera, and both of them worked fine with the camera. But now when I connect them to my Mac (iMac27" or MacBook Pro), it says "The disk you inserted was not readable by this computer". Whether the Mac is not compatible with SDXC cards or not? But I've tried different readers with no luck. Also, this issue seems like due to card size limitation because I've tried 32GB cards, and they are readable on the Mac. Is my guess right?

Best Answered by

iBoysoft author Connie Yang

Connie Yang

Answered on Wednesday, November 22, 2023

From your description, it seems like you connect your SD cards to your Mac through an SD card reader. Although you've changed different card readers, are you sure these new readers are workable and compatible with your SD cards and Mac? I suggest you directly plug your SD card into the slot on your MacBook Pro.

And are your SD cards are write-protected? You should ensure that the lock slider on the SD card is not on the lock side. Or else, the SD cards won't work on your Mac.

If the glitch is not the connection, check if it is caused by system bugs. You can eject your SD card and then unplug it. Then, restart your Mac and try again. Still no luck? Ask an expert to check your SD cards.

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