WD My Passport Ultra not recognized by Macbook Pro

I am using a Macbook Pro (circa 2012) with USB 3.0.  It will not recognize my WD My Passport (purchased in 2014).  I have it connected via USB, the light is blinking, but I cannot see the hard drive in Finder.  I also cannot see the hard drive under Disc Utility.  Help?

If your drive is Tuxera NTFS formatted, go to Tuxera website and download a driver. You can check the file system of your WD drive in Disk Utility.