WD my passport not mounting on macbook

WD External Drives External Drives for Mac
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I hope this helps you all a little ……I have solved the problem - at least for my new MBP with Yosemite already installed. I noted that my new MBP has USB 3.0 port/cable and my old MBP with Snow Leopard (with which 2TB My Passport worked perfectly), has USB 2.0 ports. SO I bought a USB 2.0 hub and voila!! It now works perfectly every time on my new MBP with Yosemite. In fact it works better than it did with the old laptop. So, it may be worth you all trying a USB 2.0 hub…