osx - How can I make another button highlighten on popup window on Mac by using Keyboard -

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enter image description here

on above shown asking popup window on mac, how can select button (left button) using keyboard. without clicking mouse button, want make left button highlighten. there shortcuts?

go preferences -> keyboard. @ bottom, turn on "all controls" under "full keyboard access".

the alternate option highlighted blue ring. hitting space activate this. if there multiple options, hitting tab alternate between them.


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