Thus spake tsnouffer:
I just updated to Yosemite and my existing version of VASSAL would not
launch. I upgraded to 3.2.14 and now it will launch. However, 3.2.14
will launch, but scrolling around a large map like Where Eagles Dare is
quite choppy. Also dragging counters around is suffering. For instance,
when I click and drag a counter I don’t see the ghost of the counter
move with my pointer.
See this thread:
Some Vassal modules not working properly with OS X Yosemite
The short answer is: Use Java 6 on Yosemite until Oracle fixes their
bug.
–
J.