My macbook recognizes the card, but says something along the lines of, unable to play footage, and it says to search for an app so it can be played. I searched that and nothing would show up on the search. A disc came with my humminbirds, and when i put it in my macbook, it says that its a different software than what macs can run. So i have no idea whats on this disc. But im thinking that the software on the disc, is the "card reader" if you will. And without that then I cant view my recordings. But that cant be uploaded to my computer because its a mac. I think if it was a windows I wouldnt be having this issue. I would like to take the disc to my mom's computer to test my theory, but most of the times, these disc are a one upload and done. And If i upload it to my mom's computer then I wouldnt ever be able to put it on a different one.