vassal not starting

my vassal wont start on mac sierra
was starting ok but scrolling really slowly on jdk 1.8
tried jdk 1.9 - wont start -
went to jdk 1.7 same error as 1.9
error enclosed
Im sensing that vassal doesnt run well either on sierra or jdk 1.8 (and above) or both
and maybe i got my mac in a funky state by bringing in 1.9 i dont know
im surprised getting same error with 1.7