Backing up on macbookpro and macbook air on same my passport

[roderick1]

Please can you advise how I can back up 2 different macbooks on the same" my passport for mac" 1tb. Currently backing up first laptop but want to understand how to segregate for 2nd macbook if possible. Many thanks

[Trancer]

Welcome to the Community.

How are you performing the backups? Do you WD SmartWare or do you use Apple Time Machine?

[roderick1]

Hi - Apple time machine

[Trancer]

If so, you only need to safely eject your unit and start Time Machine in the next computer after ensuring it uses a different name.

[roderick1]

Thank you solution found