Trying to format USB (using Linux/fdisk) so it shows up on my Mac
If you are using MAC

Open Disk Utility from Lauchpad
Select Your USB Disk Form top left corner


-Select Partition Option

-Crate choose 1 Partition fill Name, and Format details

-Then Click  apply

-Wait till it  the details
-Then select Disk Partition and Erase It.


After completing these steps you can access your USB drive on MAC,
Hope this will help you.