Are you sure you want to erase the partition 'SDCARDNAME'?
Click on the 'Erase' button (Positioned somewhere below the 'Name' field, usually found next to the 'Security Options.' button).Then under the 'Name' field go ahead and give your SD Card an easy to recognize cool name (Keep it short).For the 'Format' field drop down list, select MS-DOS (FAT) > Notice that this does not say 'Fat32' (You will see. MS-DOS (FAT32) .Select your SD Card, then select the 'Erase' tab.Your SD Card should be displayed next to your Hard Drive or any other drives that you may have mounted Once the card is displayed on your Mac OS X desktop, go to the 'Utilities' folder and click on 'Disk Utility'.
Instructions on how to format/ prepare your SD Cards for Rekordbox (CDJ2000/ CDJ900 'Mac OS X' users): Here are some very juicy instructions on how to get SD cards ready to Rock with Rekordbox!!! All SD cards will be problematic if formatted under 'Mac OS Extended Journaled' (HUGE NO! NO!)
As you had mentioned on a different Forum, you are correct about formatting SD Cards to the 'Fat' format! Also, Kingston 32GB Class 6 cards are NOT problematic once formatted to 'FAT'.