I recently purchased a 1TB WD My Passport Ultra and have a Mac Book Pro Retina 13-inch early 2015 running Yosemite 10.10.5. I was advised in the shop that I simply had to reformat the hard drive to use it as a backup for my Mac. However, in following the instructions for reformatting, I couldn’t do anything because my computer will not recognise the hard drive is there. The light is on on the hard drive and I can hear it working. Is the WD drive just not compatible with later versions of OSX? Or am I doing something completely wrong? Help!
I was hoping to upgrade to El Capitan after a backup too, please advise if the hard drive won’t work with that either!
Any ideas…? Thank you in advance