My Passport isn't working on my Mac

I just got Passport and thus far it is the worst thing ever. I have installed it into my computer, have done all the scans and yet when I go to drag photos to the passport it does not let me put files in the hard drive. I dont understand what I am doing wrong but I am extremely frustrated. 

I figured it has something to do with Time Machine, so when I instructed by Mac to select passport as the external drive for the computer, it says it must erase all content in the Passport. I say yes, and the message i get every time is “couldn’t unmount disk” I am so aggravated. 

Someone please help I need to install these photos. 

Hi KristenS, welcome to the WD Community. Sorry to hear you are having problems. It sounds like you bought a Passport that comes formatted for Windows PC’s. You can easily fix this by following the steps on the link below. 

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

Hi, 

That didn’t work. When I went to partition the drive it said that it cannot be partitioned and that it was locked.