Yesterday I purchased a WD My Passport Essential SE. My operating system is OS X 10.6 and I use a MacBook. I followed the directions on how to partition and format for the Mac. Used this page: http://wdc.custhelp.com/app/answers/detail/a_id/3865
After going through all the steps I get the error message, “Partition failed with the error, Could not unmount disk.”
Any help would be appreciated. I’d like to be able to use the Passport with the Time Machine. I’ve not used the Passport at all. Took it out of the box tonight, hooked it up and then followed directions to format.