Macbook-Pro SD Card – Troubleshooting SD Card Slot Issues

I was just going to suggest the lock switch too... but if that's not it, can you click the Partition tab and tell us how the card is currently formatted? If I remember right, OS X can read but not write an NTFS-formatted device, but it seems unlikely that your camera would have formatted the card that way.

I seemed to have the same problem with the SD card not showing up but when I opened iPhoto it just loaded my photo's off of my sd card. I have a sandisk SD card. Hope it helps :)