<Swing Dev> keyboard (not mouse) multi-select on Mac

[Pete Brunet]

How do you do a mouseless (keyboard only) multi-select on Mac, e.g. in
the List Demo of SwingSet2?  On Win, to move the focus point without
moving the selection, you use ctrl + arrow.  Then when you are at the
next list item you want to select you use ctrl + space.  I tried arrow
with control, command, and option with no luck.

Control + up/down are normally Mac Mission Control shortcuts, but
disabling those does not resolve the issue.

Is this a bug?

BTW, command + mouse click does work.

Pete