MacBook Air - My Passport 1T won't mount after Yosemite update

1) Tried to switch cables2) Won't mount on Linux or Windows3) Mac WD Drive Tools - shows me drive 1T click on - run drive status check, nothing ...same with other buttons.4).Not showing in Disk Utility or terminal 5). Lights...... 2-3 minutes steady light, then flashing with 2.5 second delay.6). Interesting note, while loading in recovery mode and then restart drive light is constantly flashing. SOS 

 
Hello
Welcome to the WD Community.
Have you tried using the WD Macintosh +TURBO Drivers ?
 

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