I've been searching around for answers to this with no luck...
When building for 32-bit, it was possible to get a notification when
the system clock changed by using a Carbon UPP and the event kind
kEventSystemTimeDateChanged.
But it appears that Apple took application event handling out of 64-
bit Carbon, so this no longer works. How can I be notified, using
Cocoa if at all possible, in a 64-bit app when the system clock
changes? I've already tried listening for distributed & workspace
notifications, and it looks like the only ones that get issued when
the clock changes are implementation details only.