Or one can continue to use wd sync and hope (pray) wd will (eventually) get around to fixing the various problems with it including high sierra compatibility. well then, its time to move on from wd and its products for apple osx users.. I also upgraded my mid-2011 imac to sierra and experienced a long wait time for the time machine backup to start. eventually, the backup was successfully completed.. Wd external hard drive mounts on you macos high sierra when it is connected to mac. mounting makes the drive available for use and is visible in finder and disk utility. in case the drive is corrupt, the data structure information is damaged or lost, which makes hard drive unmountable on macos. the only way to create a new data structure is to format the unmountable external hard drive with.
While most mac users who update to macos high sierra have no issues with the system software, there are small groups of users who have experience… kcbeme 2018-01-08 05:28:15 utc #9 i had the same problem with a new drive on my mac running high sierra..