Formatting a USB for Pioneer CDJ 900 and Windows on Mac Published on: 5th April 20186th April 2018 On Mac, Open Disk Utility and find the device. Select the hardware not the partitions. Click erase and select the following That should take a second or two. More Post navigation Previous Post Previous post: Debugging PHP in Atom by installing xdebug, in 5 minutesNext Post Next post: Selling apps, with fish.