I think the camera was set to raw, I canít remember. I did exactly the same as you have stated, but on his mac air, the EOS utility just said no pictures of that type. Maybe itís not set to raw. Will have to check next time I see it.
On my MacBook Pro, I am using Lion OS. With my EOS 50D, I just plug it in and image browser opens up asking if I want to select images for download or to just download. My MacBook wouldnít recognise his camera, but then that would be because my version is too old, I will have to update it and try again.
Iím just confused as to why his MacAir and new software wonít recognise the camera, but they will recognise the images on the memory card from a card reader??!!.