Smartware for Mac - Backup, Retrieve and Setup Drive Greyed out

WD External Drives External Drives for Mac
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Hello and welcome to the community,

WD Smartware for Mac is not compatible with the My Passport Ultra. The Passport Ultra only works with WD Smartware for Windows.

If you want to use the Passport Ultra on a Mac then you can use Time Machine or any other 3rd party backup software.