New my passport for Mac doesn't work with OS X Mavericks

Just bought 2 of these but Finder won’t create new folder on them. At total loss.


I recommend that you try formatting them first. 

Check out the link below.

How to partition and format a WD drive on Windows (8, 7, Vista, XP) and Mac OSX

I formatted both my new drives. One now works but the other gets an error. Disk Utility can’t repair it.

I’ve already tried formatting the drive, the Mac is still not seeing it.