EOS 6D-images won't upload to MAC. Error reads file unrecognizable format.

[mariadeiss]

This is my third Canon EOS camera on the same MAC OS x 10.6.8 desktop.  Have not experienced any trouble uploading images into iPhoto before.  My new camera is a 6D.  I formatted the memory card in the camera.  I even thought it was a bad card & bought a new one, only to receive the same error.  The error says the file is in an unrecognizable format.  It is only images taken on the 6D.  I tried importing directly from the camera via a usb cord & by using a card reader.  I was successfully able to upload images from my 5D Mark III.  Any ideas why I can't import the images from the 6D?

Thanks!

[hsbn]

The 6D is newer, so make sure your software is up to date. Check this list: http://support.apple.com/kb/HT4757