my iMAC can't read the SD card. Any ideas?

Does it show up in System Report>Hardware, or Disk Utility, or Image Capture?

fionten wrote:

My iMAC can't read the SD card of my Canon camera. I've tried reinserting slowly and quickly and dusting it. My camera can see the pictures on the SD card, which is only two months old. The same thing happened a few months ago. I figured it was an old card and probably damaged so bought a new one but this one has the same problem. my port was checked in store a couple of months ago too. I am running out of ideas....

How long has it been since you fully formatted the SD in the camera? I ask because some cameras are very good at messing up the card just enough that while they can read/write to it fine other systems may be confused. All it takes is a minor firmware glitch.

If you haven't hard formatted the SD in the camera for a while try downloading your pictures by connecting the camera to the iMac via USB. After the download is complete--and you have verified that it is full and complete--format the SD in the camera, snap a photo, then try connecting the SD directly to the iMac.

Might not work, but worth a try as it's free to do.

Another thing is to make sure that the firmware in your camera is up to date.

Best to use a card reader rather than plugging it into the Mac directly.