If an OSX 10.9.1 says in the Disk Utility that external hard drive is not mounted, and the “Mount” button does not do anything, does that mean the external drive is useless? Can that be repaired at all?
Hello,
Try some basic troubleshooting:
1- Disconnect the drive from the computer and restart the computer.
2- If the computer is a desktop, connect it on the back USB port (directly to the computer, not through a hub).
3- Go to "Disk Utility” to verify if the drive shows up there.
If the drive shows up in disk utility but it is not seen on the desktop, then it means the partition is corrupted and you will have to format it in order to use it again. Please note that formatting the drive will delete all data stored on it.
