A WD My Passport formatted with Mac file system will be a dud on the Windows and vice-versa. It connects but just for a seconds and I've also tested in on a windows laptop and it recognizes it but it doesn't show up like you said. Wd My Passport For Mac Not Showing Up In My Computerīut a month a ago I changed the file format so it would open on my mac and it opened for about a week and then now it won't recognize it but I can hear it spinning and vibrating and it lights up.Wd My Passport For Mac Not Showing Up On Desktop.