I have a MacBook pro 5.1 (unibody, late 2008) running OS X 10.5.8 I recently got a canon G1X camera and 64gb SDXC card from SanDisk. I just put the card in the camera and started taking pictures. Now I have 1,600 some pics on the card in raw and .jpeg, which is probably around 40 gb, and I can't get the pictures off the card. I can't connect the camera to my computer via USB because it says 'communication error', which according to the manual means that I have over 1,000 pictures on the card so it won't work. I tried an SD card reader and it said I couldn't mount the drive. DiskUtility told me it was formatted in NTFS, so I tried on a windows machine running Vista and it said I needed to format the drive before it could be read. Then I got Tuxera NTFS, still won't mount the disk. Now it lets me run 'verify disk' though, here's what I got. Verifying volume disk1s1 ntfsck 3011.12.9-mac NTFS signature is missing. Couldn't open volume '/dev/disk1s1'! Checking NTFS Superblock ... Correcting errors... NTFS signature is missing. Failed to startup volume: Invalid argument NTFS signature is missing. Trying the alternate boot sector NTFS signature is missing. Unrecoverable error Volume is corrupt. You should run chkdsk. ERROR(22): Opening '/dev/disk1s1' as NTFS failed: Invalid argument The device '/dev/disk1s1' doesn't have a valid NTFS. Maybe you selected the wrong partition? Or the whole disk instead of a partition (e.g. /dev/hda, not /dev/hda1)? This error might also occur if the disk was incorrectly repartitioned. Error: Filesystem verify or repair failed. I can look at the pictures on the camera, and on other Canon cameras (haven't tried other brands). I know that my pictures are there and the card works, but I don't know if it's actually NTFS or how to get my pictures off the card. Any help would be great.