Keyboard shortcut on OS X in IntelliJ IDEA 14 to select a button / action in a dialog using an underlined letter

On Windows / Unix in IntelliJ IDEA, you can select a button in the dialog box that opens with the keyboard shortcut ALT+ [UNDERLINED_LETTER], where different buttons can contain different letters (for example, 2 buttons such as [C] and [N] ext can be selected using keyboard using ALT+ Cand ALT+ Nrespectively).

I'm trying to find the equivalent of this on OS X. I checked the official pdf ( https://www.jetbrains.com/idea/docs/IntelliJIDEA_ReferenceCard_Mac.pdf ) as well as the keymap in IntelliJ itself, but this is complicated by the fact that this is not a specific shortcut but varies from dialog to dialog.