My passport ultra not mounting on Macbook pro 10.9

WD External Drives External Drives for Mac
4

same here,

i cannot mount the mypassport on my 2 brand new macs with 10.9.

are there more people to have this problem?

i requested a new drive from wd, and it came quickly.

same problem, it wont mount and wont show up anywhere.

i send the old drive back to wd and wait

my post:

http://community.wd.com/t5/WD-Portable-Drives/cannot-mount-mypassport-osx-10-9-mavericks/m-p/634309/highlight/false#M17296