WD My Book after sleeping not working on iMac


When the Mac wakes after sleeping for an hour or so, the external drive spins up and the partitions are shown in the finder, but they can’t be read/written to and Time Machine backups fail.
How can I fix it? Thanks


Hi CarlosJG,

We have sent a message. Please check your Community Message Inbox.



I have same thing with mine. After MAcbook goes to sleep mode drive does not respond, although it is seen, the light is lit, no blinking. does not respond.
I have to pull out the cable to restart. WD doctor utility did not find any issues.



Read this post, 4TB My Book Unable to access after sleep Mac
It might have something to do with WD software if you have it install in your system.