I have been using the iMac 27 "(i7, Late 2013) since the new OSX (Sierra 10.12) does not shut down or reboot when my external WD MyBook 3 TB hard drive is connected From the USB port separates, the computer drives down as usual, or can be rebooted, but with hard disk not.
I hope very much the Apple with Western Digital composes and solves the problem, because gitb still no current drivers for the WD MyBook.
Maybe someone has the same problem with Sierra 10.12?
Thank you if answer.
