SD card not recognized in Finder
my macbook air won't read sd card because it's full. Help!
If you have a separate card reader, and/or another product (other than MacBook/Air) to
try & read this card, do try that as a separate consideration.
Sometimes I've tried a different reader (have a few, depending on which mac and camera)
and results can vary. You may have to see if Safe mode startup can help the Mac. Be sure to
unmount any card that appears on desktop via a reader before shutdown/removal.
Good luck & happy trails!🌞