Is there a UNIX-style triple click to select path in Terminal.app?
The shortcut for Terminal.app is &#x2318;+&#x21E7;+doubleclick.

You might also be interested in the following shortcuts:


&#x2318;+K to clear the screen
ctrl+U to delete everything to the left of the cursor
ctrl+K to delete everything to the right of the cursor
ctrl+A to jump to the left end
ctrl+E to jump to the right end