I
don’t find Mavericks to be the most
user friendly OS out there. There is a
ton of stuff which suddenly does not
run as it was really Power PC
software, and Apple has ditched that
compatibility without telling us.
I
am running their Wacom Pro on the
newest operating system on a brand
new laptop with no trouble at
all…doesn't help you, I realize.
Might you uninstall and reinstall
it? A pain, I know.
Another
thing you might try (assuming you
don't do a shut down each night)
is a complete shut down of your
system, not a restart. Last week
my second monitor up and
disappeared from my desktop…it was
completely black. A total reboot
brought it back just as it was
supposed to have been.