I have a couple trail cams that I use to take wildlife pictures but too many times my Macbook Pro will not read the SD card. Sometimes if I reinsert it several times it might work, sometimes it won't. And there's times when my Macbook will read it, it won't work in my trail cams. First, I can't figure out how to format the SD cards on my Macbook, and if I did I'm not sure if they'd work in my trail cams afterwards. Any help would be appreciated. Thanks.