Mac OS - How to lower latency and adjust Frame Rate

[ChrispyPalms]

I'm using JamKazam on my iMac with an Alesis IO2 Express USB interface. The bottleneck is the latency for the Alesis that shows 13.1 ms. 
Is there a way to adjust the latency? 

Our drummer uses a MacBook Pro and his constraint is the Frame Rate. Can this be adjusted?

Thanks in advance for your help.

Brgds, CP