To do it on the Mac, plug in the flash drive, and open Disk Utility (in your /Applications/Utilities folder). The drive should appear in the list on the left of the DU window.
Select the drive, then click the Erase tab. On that tab, select MS-DOS (FAT) as the volume format, choose a disk name if you want to, then click Erase, and wait.
That said, if your drive just 'didn't work any more' after a while, it may be faulty and it's possible that re-formatting it won't help. (All flash drives do have a finite number of read/write cycles before they don't work reliably any more, too, although it's unlikely you've reached that limit through normal usage.)
Aug 23, 2008 1:22 PM
Mac Os Format Fat32
If you have an old flash drive or one that was formatted to work with Windows or another operating system, you can still format your flash drive to work on a Mac. Volume Format Most manufacturers use the FAT 32 or MS-DOS (FAT) volume format. How to format an drive to use with a Mac & PC If you want to format a drive so that you can copy files between a Mac and a PC you'll want to follow the tutorial above, but choose ExFAT from the.
Access Flash Drive On Mac
However, it is not easy to format the USB flash drive under Mac OS. Actually, if we want to format a USB flash drive under Mac OS, we should find USB flash drive formatting software at first. Here are top 5 USB flash drive formatting software tools for Mac to help in formatting, reformatting, erasing USB flash drive under OS X or macOS.