Red5 problem in mac

Hi

I am using Spark 2.6.0.beta1 and openfire3.6.0a and myopenfire server is running in windows box … One of my user using mac system … in mac system Red5 is not working itshows blank screen when i click the audio/video roster in mac spark installer its shows blank scree… and i attached the scree shot of that problem … any body have idea about that plz help me…