I have also tried Alsoft Disk Warrior version 5.0, but the drive does not show up there. This is a new Macbook Pro that I purchased 3 months ago, and I am unsure if the External Drive ever worked on it ( I cannot remember exactly when I first encountered the issue), but I have tried to mount it on my older Macbook Pro ( where I originally used it when I bought the drive 2 years ago), without success. Using WD Drive Utilities ( Version 2.0.0.23), the drive shows up in the UI after 2:08 minutes ( again this is repeatable), but nothing happens when I click either “ SMART Status”, “ Quick Drive Test” or “ Complete Drive Test” – there are no failures, no messages and no indication that any action has actually being executed. The drive is always visible in the USB Device Tree section of “About this Mac” -> System Report. However, it is not visible in Mac OSX Disk Utility at any point ( I am using Yosemite). When I try to mount it, I get a brief whirring followed by a beep\click sound, and this repeats every 3 seconds for about 2:38 minutes ( repeatable time measurement, which is interesting in istelf). I have a 2-year old My Passport for Mac 1TB (USB 3.0) WDBGCH0010BSL Model, and recently it seems to have failed.