Of course it is a Mac format, I deliberately formated the card so the camera do not recognize it and offers me to format the card, but it shows error again and again, no matter I format the card in Windows, Mac, with Acronis Disk Director in FAT, NTFS, Journaled, the card does not work with D7000 and D7100, and it works everywhere else.
Many people have the same or similar problem with Kingston sd cards.
Again, I have gb Kingston class 4 Micro SD with adapter which works well.
It is strange, but Kingston is maybe problematic and that is maybe the reason Nikon does not approve their cards.
At the same time, I had Kingston computer memory and usb drives for so many years without any problem.