But, how to format/reformat an unrecognized, inaccessible, unreadable or virus-infected USB flash drive under Mac OS? Don't worry, here is an easy & secure solution to help you format Not Read or unrecognized USB flash drive on your Mac. Actually, when an USB flash drive gets unrecognized on your Mac, formatting is the best solution to solve this issue. When an USB flash drive becomes inaccessible on your Mac, what should you do? You may want to format the USB flash drive on your Mac to solve this issue. How to format the unreadable USB flash drive on a Mac? Could you help me?' – Mike However, I should format it on my Mac at first. When I connect it with my Mac, I can't find the USB flash drive on my Mac. Unfortunately, this USB flash drive is attacked by unknown virus.
