iMac not recognising or detecting 20TB My Book Duo

Hi

Just purchased the new external 20TB My Book Duo for my iMac & also downloaded the WD Discovery software, but my iMac syill does not recognise or detect my new drive !

I’ve followed the step by step instruction on installation guide, but still no good

Is there any idea’s views that I could try apart from thinking there’s something wrong with the new drive

Many thanks

Hi, bigjono,

Well if the drive is not showing up on the host device, please go to the given link and follow all the instructions given over there: