I recently bought the above item. After installing to my Intel based iMac, kept disconnecting itself. Talking to custom service of WD encouraged me to go for a replacement to the store. I did that and the problem came up again. The message i get is:<< WD My Passport 0740 Media is in use and cannot be powered off. Try quitting applications and try again>>.
Can anyone help me. I am frustrated, also because i already own one (USB2.0) since 2 years and it backups my Macbook fine.
Thank you in advance