Just Purchase A My Passport Ultra for a MAC

[islandnard]

Will this HD work with OS X 10.10.1? 

[Trancer]

Welcome to the Community.

Yes, you will only need to format it.

[islandnard]

Okay I should know what you’re talking about but I don’t. Can you lead this horse to water and tell me where I go to get the instructions?

[Trancer]

For instructions in order to format/partition a hard drive, please visit the following link:

http://wdc.custhelp.com/app/answers/detail/a_id/3865/