WD external hard drive not showing up on Mac

[imaskingforhelp]

My WD external harddrive will not show up on my macbook pro and I just bought it. I want to format it but as I said it doesn't show up, even when I go to disk utilities. The harddrive does show up on my windows. What to do?

 

[CAMusing]

http://support.wdc.com/product/install.asp?wdc_lang=en

 

[imaskingforhelp]

Thank you very much!