SD card not readable in Catalina
Just bought Sandisk 64GB 170MB/s SD cards but my 2013 iMac running Catalina can't read the card and it doesn't show in Finder and won't mount in Disk Utility.....anybody help please ??
iMac 27″, 10.15
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Just bought Sandisk 64GB 170MB/s SD cards but my 2013 iMac running Catalina can't read the card and it doesn't show in Finder and won't mount in Disk Utility.....anybody help please ??
iMac 27″, 10.15
Hi silverfox63,
Unplug the SD card, wait a moment, then re-insert it very quickly into the Mac.
If it still doesn't show up,
Cheers,
Jack
Hi silverfox63,
Unplug the SD card, wait a moment, then re-insert it very quickly into the Mac.
If it still doesn't show up,
Cheers,
Jack
Thanks Jack I'll give that a try, but what's the problem? I've used and still use other SD cards for years for photography with no trouble, it only seems to be these three brand new ones that are a problem.
What I've found recently are two things, both physical in nature:
First the SD cards wouldn't show up in two 2011 Macbook Airs, wiggling the card in the slot made them reappear, the conclusion being just dirty contacts.
Second, the now readable cards could not be written to and all showed up as no_write. The also could not be formatted regardless of the lock-switch position on the cards, or the speed of insertion as suggested elsewhere. I concluded a possible cause could be the lockswitch position sensor in the Macbook's card reader. Being hard to reach and clean I tried putting one or two pieces of tape over the entire lockswitch-channel on the card itself and to my surprise it worked, most of the time. Filling the gap in the lockswitch-channel and then taping it over appeared to do the trick.
Good luck.
If anybody knows how to clean this little switch, as it is probably just a little sticky, please advise.
I've noticed with some Macs you need to insert the card very quickly into the slot, otherwise it will not register. It also might need formatting, and the Mac might need some resets.
Cheers,
Jack
Thanks again Jack I'll try tomorrow, half asleep now ... think I need resetting.
SD card not readable in Catalina